10239906 HeadsThese cylinder heads are ideal for applications up to 350 horsepower, but they require Vortec-specific intake manifolds. We’ll start with the basics around the 64-cc chamber design. INCLUDES: 64cc COMBUSTION CHAMBER. We appreciate the support and encouragement we have received from our visitors around the world for the past 20 years. Thanks soonerjay, I take it your a big Okie Sooner fan. 350 Chevy 96 Up Vortex Cylinder Heads 906 & 062 Casting – Pair - Part #EQ-CH350C REPLACES CASTING NUMBER 12558062| 10239906| INTAKE RUNNER 170CC / COMBUSTION CHAMBER 64CC| STRAIGHT SPARK PLUG Part#: EQ-CH350C. The thick exhaust seat, AFAIK, was only used on the 3/4 ton and larger truck 350's, not the 1/2 tons. I have a sbc with 906 heads casting number 10239906. Cast-Iron Chevy Vortec heads #10239906 1. Part # : 10239906 , also. The 906 casting is the only 350 vortec head I have ever seen. One pair of 1995 Vortec heads, fresh valve job and new seals and big valves. Comes as pictured. GM 10239906 Head, Cylinder (Cstg) Part Description Head, Cylinder (Cstg) Manufacturer General Motors $319. Combustion Chamber Size Combustion chamber size is also a critical spec since it is the major contributor – along with piston crown configuration – in determining the engine’s compression ratio. To ensure reliability, purchase GM part # 10239906 Head, Cylinder(Cstg). Good condition need cleaning and checking out stored inside for several several years Casting numbers 93417369 Vortech head 10239906 14096217 462624 $100 each Call Ken show contact info do NOT contact me with unsolicited services or offers post id: 7610624903 posted: 22 days ago updated: 5 days ago. Chevy Small-Block Cylinder Heads. This particular head. REPLACES CASTING NUMBER 12558062| 10239906| INTAKE RUNNER 170CC / COMBUSTION CHAMBER 64CC| STRAIGHT SPARK PLUG Part#: EQ-CH350C Vehicle Manufacturer: Chevrolet Years: 1996-2006 Engine: V8 Liters: 5. 1996 -2002 Gm 10239906 Sb Chevy Vortec Heads Pair. of Cylinders: 4: Car Maker: Chevrolet: Warranty: 12 months: MOQ: Different MOQ for different products. Although these heads are great for street use, they are not designed to be used in high rpm and high-horsepower applications due to the small intake ports. 50 Valves, 170CC Intake, 64CC, Pair. These newly designed for 1996, state of the art heads are made from cast iron and replaced the former swirl-port TBI heads that had been previously used on the GM truck 350. The Phase 2 Bow Tie head has a revised combustion chamber design with a true volume of 64cc's. Beginning in 1996 to '00, L-31 Vortec heads were installed from the factory on GM truck and van 350 engines. 7l 350 Mag V8 Vortec Marine Cylinder Head 10239906 at the best online prices at eBay! Free. (non hardened seated heads) As a minimum, 30 to 40 percent of the vortec heads that come in are cracked. REPLACES CASTING NUMBER 12558062| 10239906| INTAKE RUNNER 170CC / COMBUSTION CHAMBER 64CC| STRAIGHT SPARK PLUG Part#: EQ-CH350C Vehicle Manufacturer: Chevrolet Years: 1996-2006 Engine: V8 Liters: 5. 7L 350 Vortec Cylinder Heads 906 / 062 PAIR at the best online prices at eBay! Free shipping for many products! 10239906 , 12558062. These Vortec cylinder heads offered by Chevrolet Performance offer 20 – 40 horsepower more than factory early-style small block Chevy cylinder heads. I know this is a popular casting but Ive aquired a set with the casting 13120906. The intake valve seats are machined for 2. 350 Chevy 96 Up Vortex Cylinder Heads 906 & 062 Casting – Pair- Part #EQ-CH350C. The 060 cast number is the actual first casting, and can be turned into either the 062 or 906 dependant of application. Good condition need cleaning and checking out stored inside for several several years Casting numbers 93417369 Vortech head 10239906 14096217 462624 $100 each Call Ken show contact info do NOT contact me with unsolicited services or offers post id: 7610624903 posted: 22 days ago updated:. Here is the casting number 10239906, which is one of the two casting numbers that GM used on Vortec cylinder heads. Other than that, all the L-31 Vortec heads are the same and flow the same. 7L / 350 Vortec Cylinder Head SET Assembly with Stainless Steel Valves for Marine Applications. 7 REBUILT Vortec heads 10239906 - $300 (East Indanapolis) View larger image Ad id: 1010190359849331 Views: 45 Price: $300. Find many great new & used options and get the best deals for Mercruser GM 5. Be sure and use ARP thread sealant. The 906 casting is the only 350 vortec head I have ever seen. 12529093 - Vortec L31 350 bare cylinder head, cast iron, seats cut for 1. Although these heads are great for street use, they are not designed to be used in high rpm and high-horsepower applications due to the small intake ports. 7 Casting / OEM: 12558062-10239906 PREVIEW ON EBAY Primary Sidebar Sign up for our newsletter Receive current offers, updates and special events. Chevy Intake Manifolds Use these numbers to identify your stock Chevy intake. 5 valves Would be a good set to put on a 90 Chevy with the TBI ? Click to expand A thread on using TBI on Vortec heads: http://www. You are correct, some say the 062's flow just slightly better on the exhaust side, but I believe the intake is the same. Jason Marketing Manager Contact Now Inquiry Basket GUANGZHOU TIANXU AUTOMOTIVE CO. I missed the chance to see the shrinkheads cuz I didn’t. Initially, there were two versions of the #906 casting head. Small Block Casting numbers Back to FAQ Home. 50 Valves 170cc Intake 64cc Pair. 7L V8 Vortec Marine engine Head # 10239906. 02 STAINLESS STEEL INTAKE VALVES 1. Here is the casting number 10239906, which is one of the two casting numbers that GM used on Vortec cylinder heads. There turns out to be several changes to this head that deserve investigation before blindly diving into the small-block Vortec head game. Affordable, reliable and built to last, GM part # 10239906 Head, Cylinder(Cstg) stands out as the smart option. 12367713: 1999 ZZ430 crate engine, aluminum, 62cc chambers, 210cc intake port, 2. Should add about 50 HP to most 350's. Cylinder Head Fitment Type: Direct Replacement Core Charge: Core Return Required within 21 Days Manufacturer Part Number: 10239906 Vintage Part: No Finish: CBN (Cubic Boron Nitride) Universal Fitment: No Item. Be sure and use ARP thread sealant p/n 1011009904 on the rocker arm stud threads. Used head from marine engine. Cylinder Heads Chevrolet Vortec 350 Cylinder Head Heads 10239906 Be the first to write a review About this product 2 Refurbished: Lowest price $829. 02" diameter valves; the induction hardened exhaust valve seats are finished for 1. The tree cafe, #11 among Ban Pho restaurants: 62 reviews by visitors and 10 detailed photos. GM has and does take some of the P/N 12558060 heads made from either of these castings and makes alterations to them to better fit specific applications. There are actually two different casting numbers for the Vortec head, the 10239906 and the 1255062. Most Dart big-block aluminum heads come with 121cc chambers but the 275cc oval port does offer a 110cc option. This particular head was used on SBC 350 engines produced from 1968 through 1970 which would indicate that the cast year was almost certainly 1968. 99 Free Shipping Get it by Mon, May 8 - Fri, May 12 from Gwynn Oak, Maryland • Remanufactured condition • 30 day returns - Buyer pays return shipping. Camshafts with more than 0. GM 10239906 SB Chevy Vortec Heads, 1. These heads come completely assembled and ready for install. General Motors Manufacturer Part Number 10239906 eBay Product ID (ePID) 656004825 Product Key Features Material Cast Iron All listings for this product Listing type: Buy It Now Condition: Pre-owned Mercruiser GM 5. รวมโครงการบ้านจัดสรร สุพรรณบุรี โครงการใหม่ บ้านเดี่ยว ทาวน์เฮ้าส์ ทาวน์โฮม คอนโด ทุกทำเล ใน จ. 7 Chevy 350 Vortec Cylinder Heads 96-02 10239906. You are correct, some say the 062's flow just slightly better on the exhaust side, but I believe the intake is the same. The casting number is 10239906. 500" valves • Uses bare head 12529093 • 64cc combustion chamber • Straight spark plugs • No heat risers • Requires Vortec-specific intake manifold. 5" valves, 170cc intake runner volume, 64cc chambers, no springs, retainers or valves, has. Chevy enthusiasts quickly discovered that these heads are capable of 400 hp right out of the box when teamed with a performance intake and a camshaft. None of my 906's have the bigger exhaust seat either. An out of the box set of Vortecs will beat a ported set of L98s by an easy 30-40 hp. 7L 350 Vortec Cylinder Heads 906 PAIR. 00 Free shipping Angle Plugs Small Block Chevy Cylinder Head SBC Aluminum Bare SB 327 350 383 V8 $186. fits 1996 and up INCLUDES: 64cc COMBUSTION CHAMBER 185cc INTAKE RUNNERS 2. Small block Chevy heads fits 5. Valve spring seat diameter is 1. The quench areas beneath the spark plugs are filled to increase compression in competition engines. Chevrolet 5. 10239906 which code up as Vortec 5700 heads with; 170 intake port 64cc chamber 194/1. General Motors Manufacturer Part Number 10239906 eBay Product ID (ePID) 656004825 Product Key Features Material Cast Iron All listings for this product Listing type: Buy It Now Condition: Pre-owned Mercruiser GM 5. 000" Bore Fixture Lift----Intake----Exhaust. This cylinder head has a casting number of 3947041 and a date code of J108 signifying that this cylinder head was cast on October 10, in a year that ended in 8 (1968, 1978, 1988, etc. The Vortec heads are a little bit lighter than the older heads and have a “kidney” or “heart” shaped combustion chamber that is more efficient than the double hump chamber. To ensure reliability, purchase GM part # 10239906 Head, Cylinder(Cstg). 350 Chevy 96 Up Vortex Cylinder Heads 906 & 062 Casting – Pair - Part #EQ-CH350C REPLACES CASTING NUMBER 12558062| 10239906| INTAKE RUNNER 170CC / COMBUSTION CHAMBER 64CC| STRAIGHT SPARK PLUG Part#: EQ-CH350C. These cylinder heads. Fitment Type: Direct Replacement. REPLACES CASTING NUMBER 12558062| 10239906| INTAKE RUNNER 170CC / COMBUSTION CHAMBER 64CC| STRAIGHT SPARK PLUG Part#: EQ-CH350C Vehicle Manufacturer: Chevrolet Years: 1996-2006 Engine: V8 Liters: 5. Small block Chevy heads fits 5. If either of these two castings have not been altered by GM and the part number changed from 12558060 or altered by someone else (previous owner, etc. This head 100% fits for General Motors cars. Find many great new & used options and get the best deals for Chevrolet Vortec 350 Cylinder Head Heads 10239906 at the best online prices at eBay! Free shipping for many products! Chevrolet Vortec 350 Cylinder Head Heads 10239906 for sale online | eBay. Here is the casting number 10239906, which is one of the two casting numbers that GM used on Vortec cylinder heads. GM 10239906 SB Chevy Vortec Heads, 1. These are L98 Corvette heads, not known for their high RPM abilities even when ported, just fine for a mildly hopped street engine. Rocker arm studs can be pinned or drilled and tapped to 3/8". You must see the shrink heads!!! Review of Museo Pumapungo. To ensure reliability, purchase GM part # 10239906 Head, Cylinder(Cstg). I have heard good and bad about these heads. 85 ( 37%) ADD TO CART Ships in 1-3 Business Days Product Specifications Warning: California’s Proposition 65 Genuine GM Part 10239906, the Right Choice. 475" lift require machining valve guide bosses and checking valve seal to valve spring retainer clearance. VORTEC HEADS HAVE A DIFFERENT INTAKE BOLT ANGLE ON SOME BOLT LOCATIONS VORTEC HEADS YOULL FIND IN SALVAGE YARDS HAVE THESE HEAD MARKINGS The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). Vortec heads also have a "kidney" or "heart" molded combustion chamber, which is more effective than a double hump chamber. 50 Valves, 170CC Intake, 64CC, SINGLE | eBay 101505 Aluminum Cylinder Head for Small Block Chevy Sponsored $417. Chevy cylinder head Identification - Small block casting numbers Chevy cylinder head Identification - Small block casting numbers, Big block cylinder head, camel back heads, double hump heads Find cast numbers Cylinder Head ID Use these casting numbers to identify the heads you have. 350 Chevrolet New Gm Vortec Cylinder Head W New Stainless Steel Valves. Originally, the stock #906 casting head was available in two. It's made of top quality materials, it has passed. The L31 Vortec was available in two casting numbers: 10239906 (#906) and 12558062 (#062). 500 OEM valve job and shape Flow tested on SF-600 FlowBench Flow tested at 28" on 4. REPLACES CASTING NUMBER 12558062| 10239906| INTAKE RUNNER 170CC / COMBUSTION CHAMBER 64CC| STRAIGHT SPARK PLUG. Casting number 10239906 or 12558062. This place offers you dishes for THB 33 - THB 200. Small Block Casting numbers Use these casting numbers to identify the exhaust manifolds you have. This cylinder head has a casting number of 3947041 and a date code of J108 signifying that this cylinder head was cast on October 10, in a year that ended in 8 (1968, 1978, 1988, etc. Find on the map and call to book a table. Engine 10239906 Vortec 5700 Cylinder heads 23009 Views 6 Replies 6 Participants Last post by cobalt327 , Feb 18, 2013 R Rob Keller Discussion Starter · Oct. Originally, the stock #906 casting head was available in two versions. The valves seats in these heads can be machined to 2. Casting number 10239906 or 12558062. 50 Valves, 170CC Intake, 64CC, SINGLE | eBay 101505 Aluminum Cylinder Head for Small Block Chevy Sponsored $417. 96 Free shipping GM 12558062 SB Chevy Vortec Heads, 1. NEW AFTERMARKET CAST IRON GM CHEVY PERFORMANCE 302-350 906 VORTEC CYLINDER HEADS. 7L V8 Vortec Marine engine Head # 10239906 $150. Buy the RHS version, much heavier casting. Description NEW AFTERMARKET CAST IRON GM CHEVY PERFORMANCE 302-350 906 VORTEC CYLINDER HEADS. Common as hell in my neck of the woods to find "take offs" cracked in the exhaust seat area. Are these both the same heads? I just see no listings of this number at all and wasn't sure if someone has come across this. The Vortec heads are a little bit lighter than the older heads and have a “kidney” or “heart” shaped combustion chamber that is more efficient than the double hump chamber. Bundle Description: 2 cylinder heads. It's a genuine General Motors part with an OEM part number 10239906. This is a New Aftermarket Stock 5. Small Block Casting numbers Big Block Crankshaft Cylinder Head ID Use these casting numbers to identify the heads you have. When GM does this, they change the part number of the head. I have a sbc with 906 heads casting number 10239906. Cast-Iron Chevy Vortec heads #10239906 1. All Generations Performance Vortec heads #10239906 42005 Views 16 Replies 10 Participants Last post by kamero68 , Mar 23, 2005 H Hobbes9112 Discussion Starter · Mar 22, 2005 Have a chance to pick up a set of vortec heads and an edelbrock air gap intake for a pretty good price. Our components are ENGINEERED and designed to provide you with the ultimate in safety and performance. 00 Free shipping Angle Plugs Small Block Chevy Cylinder Head SBC Aluminum Bare SB 327 350 383 V8 $186. Vehicle Manufacturer: Chevrolet. 350 Chevy 96 Up Vortex Cylinder Heads 906 & 062 Casting – Pair- Part #EQ-CH350C. Our components are ENGINEERED and designed to provide you with the ultimate in safety and performance. Heads on the built engine will be 14102191 76 cc LO5 swirl port or 14102193 64 cc LO5 swirl port for 1995; with 10239906 and 12558062 64 cc L31 Vortec used for 1996-2000 production and post 2000 L31 Crate engines. Used head from marine engine. Thanks in advance, Drew B bman440440 Petty Officer 1st Class Joined Apr 4, 2011 Messages. The most famous heads are the 461 and 462 heads that offer 160-cc intake ports, 64-cc chambers, and 2. 10239906 - the head to avoid due to the pressed in exhaust seat which kills flow in the low-mid range of valve lifr 12558060/12558062 - The desirable heads. THESE HEADS ARE SOLD AS A PAIR. Be sure and use ARP thread sealant p/n 1011009904 on the rocker arm stud threads. There turns out to be several changes to this head that deserve investigation before blindly diving into the small-block Vortec head game. The 906 Vortec came in two "versions" as Soonerjay mentioned. Order) Customization: Available | Customized Request Contact Supplier Mr. html Vortec heads general info: • Vortec heads See more Reply Save Like. The two casting numbers are 10239906 and 12558062. VORTEC HEADS HAVE A DIFFERENT INTAKE BOLT ANGLE ON SOME BOLT LOCATIONS VORTEC HEADS YOULL FIND IN SALVAGE YARDS HAVE THESE HEAD MARKINGS The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). ) Reviews Product Accessories for Complete Cast Iron Vortec Cylinder Head Assembly 12691728 + Add to Cart + Add to Cart. 906's are great heads. The two casting numbers are 10239906 and 12558062. VORTEC HEADS HAVE A DIFFERENT INTAKE BOLT ANGLE ON SOME BOLT LOCATIONS VORTEC HEADS YOULL FIND IN SALVAGE YARDS HAVE THESE HEAD MARKINGS The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). What is a sooner anyway , these team names are hard to figure out. The most famous heads are the 461 and 462 heads that offer 160-cc intake ports, 64-cc chambers, and 2. 10239906 - the head to avoid due to the pressed in exhaust seat which kills flow in the low-mid range of valve lifr 12558060/12558062 - The desirable heads. There is no difference between either of the Vortec head (P/N 12558060) castings except for a couple of minor external cosmetic details. HD 3/4 ton -1 ton trucks got the 906 with the single-angle Inconel exhaust seat for durability, the 1500 series trucks got the regular 3-angle exhaust seat indentical to the 062. Find many great new & used options and get the best deals for New Chevrolet Chevy GM GMC 5. 12558062 casting has 3 small humps. Heads look like vortec style, left head casting number 10239906 this head has the #1 valves removed looks like it was burning coolant. Gm 12558062 Sb Chevy Vortec Heads 1. These are the best ones to get. OEM 10239906 350 Old Model Engine Cylinder Head for Chevrolet350 GM350 Vortec 5. The casting number is 10239906. Vortec style intakes to match the Vortec intake/head bolt pattern are now available for two or four barel carbs, TBI and TPI setups. 350 Chevrolet New Gm Vortec Cylinder Head W New Stainless Steel Valves. GM 10239906 Head, Cylinder (Cstg) Part Description Head, Cylinder (Cstg) Manufacturer General Motors $319. ), the heads produced by either casting will be identical except for the external cosmetic difference. OEM 10239906 350 Old Model Engine Cylinder Head for Chevrolet350 GM350 Vortec 5. 7 Casting / OEM: 12558062-10239906 PREVIEW ON EBAY Primary Sidebar Sign up for our newsletter Receive. The rocker arm studs can be pinned or drilled and tapped 3/8". 00 shipping Chevrolet Chevy GM Marine 5. com/forum/350-vortec-tbi-conversion-210716. It's made of top quality materials, it has passed not only all manufacturer's tests but also General Motors quality control and has to endure rough road conditions over a long time. Vortec cylinder heads significantly outflow non-Vortec service replacement cylinder heads and earlier OEM cast-iron heads. I've installed 2 sets and have a 3rd set here for another engine. Casting number 10239906 should be avoided. Our GM parts and accessories are expedited directly from authorized GM dealers strategically located all across the U. OEM 10239906 350 Old Model Engine Cylinder Head for Chevrolet350 GM350 Vortec 5. 10239906: Material: Cast iron or aluminium alloy: No. None of my 906's have the bigger. Part # : 10239906 , also fits 062 , 12558062 ; 12558060 ; 3857663 ; 938-8M0115137; 803860T Specs : Combustion Chamber Volume: 64cc Intake Port Volume: 170cc Exhaust Port Volume: 87cc Intake Valve Diameter: 1. Should add about 50 HP to most 350`s. Vortec style intakes to match the Vortec intake/head bolt pattern are now available for two or four barel carbs, TBI and TPI setups. The 062 if it is still untouched has a 3 angle valve job on a hardened seat. Full-Day Ingapirca, Gualaceo & Chordeleg from Cuenca. Bogie See more Save Like CNC BLOCKS NE · #6 · Mar 1, 2016 880 castings are a 1 piece seal some set up for fuel. These Vortec cylinder heads offered by Chevrolet Performance offer 20 – 40 horsepower more than factory early-style small block Chevy cylinder heads. 7 Chevy 350 Vortec Cylinder Heads 96-02 10239906. I don't think it is enough to even worry about, and it can easily be corrected with some polishing. , LIMITED Diamond Member Since 2021. This is a New Aftermarket Stock 5. Find many great new & used options and get the best deals for Chevrolet Vortec 350 Cylinder Head Heads 10239906 at the best online prices at eBay! Free shipping for. Reviewed September 4, 2019 via mobile. Top ways to experience Museo Municipal de Arte Moderno and nearby attractions. I went through that thread quite a bit but thought I could quicker response here from a member who runs the seat issue 906 heads. Possibly cracked head? Right head #12558062 block #10243880, Has one piece rear main, plastic timing cover looks like the spider for roller lifters and 5. 7L V8 Vortec Marine engine Head # 10239906. Coolant will leak into the engine oil if you do not!. Not great heads, but the better of the 305 units :thumbsup: And why is this post in "Bench" vs. Spare Part Information Technical Details. OEM GM parts are the best for restoring your vehicle to factory condition performance. 6% Positive feedback Contact seller. 48" (Casting P/N 10239906 or 12558062. Heads look like vortec style, left head casting number 10239906 this head has the #1 valves removed looks like it was burning coolant. Not only do OUR KITS FIT, but they work - and they work every time. This head 100% fits for General Motors cars. 7 cast into the block behind #7 cyl. For years, these were coveted castings in the performance community that were not superseded until the advent of the Chevy over-the-counter Turbo and Bow Tie iron pieces. I went through that thread quite a bit but thought I could quicker response here from a member who runs the seat issue 906 heads. โครงการกำจัดขยะมูลฝอยเทศบาลเมืองสุพรรณบุรี เทศบาลเมืองสุพรรณบุรี รหัสไปรษณีย์ 72000 ดู เพจโซเชียล 2 เพจ รวมถึง Google และ Foursquare และข้อมูลเพิ่มเติม. Chevy enthusiasts quickly discovered that these heads are capable of 400 hp right out of the box when teamed. Description NEW AFTERMARKET CAST IRON GM CHEVY PERFORMANCE 302-350 906 VORTEC CYLINDER HEADS. สุพรรณบุรี พร้อมข้อมูล รูปภาพ แผนที่ ราคา. and are backed by the manufacturer's 12 month, 12,000 mile warranty. Casting number 10239906 should be avoided. 10239906 casting has one large single hump. Possibly cracked head? Right head #12558062 block #10243880, Has one piece rear main, plastic timing cover looks like the spider for roller lifters and 5. Complete Cylinder Head Bolts Head Gasket Set Fit 96-02 Chevrolet Gmc 5. Chevy cylinder head Identification - Small block casting numbers Chevy cylinder head Identification - Small block casting numbers, Big block cylinder head, camel back heads, double hump heads Find cast numbers Cylinder Head ID Use these casting numbers to identify the heads you have. 60 STAINLESS STEEL EXHAUST VALVES. Small block Chevy heads fits 5. Find many great new & used options and get the best deals for Chevrolet Vortec 350 Cylinder Head Heads 10239906 at the best online prices at eBay! Free shipping for many products! Chevrolet Vortec 350 Cylinder Head Heads 10239906 for sale online | eBay. 02 STAINLESS STEEL INTAKE VALVES. Head can be cut for 2. 7L / 350 Vortec Cylinder Head SET Assembly with Stainless Steel Valves for Marine Applications. The Phase 2 Bow Tie head has a revised combustion chamber design with a true volume of 64cc's. If your installing them what kind. They could take a 383 to 390-400 horse, I doubt any more as they just can't be made to breath that deeply without getting wet. Casting number 10239906 or 12558062. Here is the casting number 10239906, which is one of the two casting numbers that GM used on Vortec cylinder heads. Chevy cylinder head Identification - Small block casting numbers Chevy cylinder head Identification - Small block casting numbers, Big block cylinder head, camel back heads, double hump heads Find cast numbers Cylinder Head ID Use these casting numbers to identify the heads you have. It's a genuine General Motors part with an OEM part number 10239906. Thanks soonerjay, I take it your a big Okie Sooner fan. GM 10239906 SB Chevy Vortec Heads, 1. The 906 casting is the only 350 vortec head I have ever seen. 10239906: 1996 350ci, Vortec 5700, L31, 64cc chambers, 170cc intake ports, 1. These cast-iron Vortec cylinder heads are from Chevrolet Performance are designed to fit Small Block Chevy Vortec engines. Cast-iron Vortec Cylinder Head Assembly • Completely assembled with 1. 96 Free shipping GM 12558062 SB Chevy Vortec Heads,. 00 One pair of 1995 Vortec heads, fresh valve job and new seals and big valves. This cylinder head has a casting number of 3947041 and a date code of J108 signifying that this cylinder head was cast on October 10, in a year that ended in 8 (1968, 1978, 1988, etc. Please enter your registered email address :. com is your prime online source with the biggest and. 12367712: 1999 Fast Burn Vortec, aluminum, angle plug, 62cc chambers, 210cc intake ports, 2. Engine 10239906 Vortec 5700 Cylinder heads 23009 Views 6 Replies 6 Participants Last post by cobalt327 , Feb 18, 2013 R Rob Keller Discussion Starter · Oct 30, 2007 Hey Y'all I was wondering if these heads 10239906 which code up as Vortec 5700 heads with; 170 intake port 64cc chamber 194/1. 60 STAINLESS STEEL EXHAUST VALVES STRAIGHT PLUG ASSEMBLED WITH HARDEN KEEPERS AND RETAINERS.