stock 72 heads
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Instructor
Joined: Oct 2002
Posts: 214
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From: spring tx
stock 72 heads
small block heads what were the valve sizes and chamber sizes for 72 small block heads that came on the corvette in 72...also would i be lucky enough to find some one with flow #'s for those heads? :chevy
Drifting
Joined: Nov 2000
Posts: 1,428
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Re: stock 72 heads (blue72lt4sc)
According to my "Corvette Black Book", 3 different heads were used on 72 350s. Mostly 3973487s were used on both 350 engines (200 & 255HP), but some 3998916s and 3998993s were used also........Thats all the info I can give ya. Hope it helps. :cheers:
Instructor
Joined: Jan 2003
Posts: 222
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From: Ventura CA
Re: stock 72 heads (blue72lt4sc)
http://www.mortec.com can give you some casting number info sometimes, for the 3973487 heads it says "used on 71-72 LT1 350, 75 cc chamber"... for the 3998916 it has a little more "also used with 72 LT1, big valves, screw in studs, 76cc chambers"... for 3998993 it says "307/350 72-73 75cc chambers" There's some other neat info on that site too. Hope you figure your heads out!
Melting Slicks
Joined: Feb 2003
Posts: 2,529
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From: Auburndale Florida
2025 C2 of the Year ('64-'66) Finalist - Unmodified
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Re: stock 72 heads (blue72lt4sc)
FYI....Ihave a '72 with the L-48 engine, matching #'s, original trans, etc. The heads are the "487" X heads. These are correct for the year but I am not sure for the Vette. I am told they flow good and I know they have 2.02" and 1.6" valves.
