Big Block Chevy Canfield Aluminum Heads 2.30/1.88 Valves Pair 496 454 427 396

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Welcome Speed Works has teamed up with Wilkes Performance to bring you some really nice Big Block Chevy Canfield heads! We have sold and tested tons of these heads. These heads have  Race Stainless valves, titanium retainers, race springs! All heads are disassembled, cleaned, inspected, and had a 5 angle valve job done! These heads will be ready to bolt on.   If you have any questions please ask or you can visit our website! We also have a facebook page and can get any other parts you may need! Please check us out! Please give us feedback as well! VALVE LIFT .100 .200 .300 .400 .500 .600 .700 .800 Intake Port    72  161  240  299  339  358  356  355 Exhaust Port 74  126  181  224  256  286  306  317 These are typical flow numbers at 28 inches of water measured on a SF 600 bench by an independent shop. TECHNICAL DATA Intake runner volume 310 c.c. Typical 2.450 x 1.750 rectangular port opening. 24.5 degree intake valve angle Intake seat insert 2.375 diameter for up to a 2.35 valve Exhaust runner volume 100 c.c. Typical 1.625 x 1.900 modified D shaped exhaust port Exhaust insert 1.937 diameter. For use with 1.88 valve Exhaust port raised .600 inch Combustion chamber size 118 c.c. Head bolt or studs requires 5 long exhaust fasteners Optional CNC combustion chambers available 11/32 X .502 manganese bronze valve guides .531 valve guide seal boss Spring pockets 1.770 diameter Alloy valve seats 356A virgin aluminum material T-6 heat treat Standard placement accessory holes Roll formed holes (stronger than cut threads) 7/16 rocker stud holes .700 thick deck Chamber roof .500 thick Port walls .250 thick typical Airflow exceeds many other heads with cross sections of far greater size Spark plug provision for .750 reach 5/8 hex plugs both gasket and tapered seats. Gasket seat style plugs are preferred. Intake valve (5.300 reference) with .060 spring cup wills typically yield a 2.00+ installed spring height. Exhaust valve (5.425 reference) with .060 spring cup will typically yield 1.950-installed height, with most aftermarket standard retainers and locks. *Valve spring retainers, locks, and valve lengths vary from manufacturer to manufacturer. It is not unusual for valve manufacturers to use a plus .050 length as their standard. Valve spring retainers can also be a plus length. Rocker stud locations with +.100 long valve lengths to yield proper geometry. Custom length push rods will be necessary Stud girdles use a girdle designed specifically for Canfields for best results. Stud girdle will require some different components to be used. *****NOTE THESE TAKE 2-3 WEEKS TO BUILD****  WE CUSTOM BUILD EVERY HEAD AND TEST THEM BEFORE THEY LEAVE OUR FACILITY!  SOMETIMES WE CAN GET THESE OUT SOONER!
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