I have a set of GM heads. The casting number is 3927186. Could be from 68-69 302 or 350. With 2.02, 1.60 valve's. how can i tell if there "double hump" heads? Also 302 i think was only z28 camaros. soo i think thos are reall rare. the intake is a casting 3972110, with the Winters snow flake. its from a 1970. Is it rare?

Thanks

 

3927186: 63cc combustion chamber, 2.02 or 1.94 Intake, 1.60 or 1.50 Exhaust, 1968-72 Double hump, no accessory holes 302/350.
The "double humps" are cast into each end of the heads.

The 3972110 is a production 1970 only intake for Corvette, Yenko Nova and Z28 Camaro with 350ci 360-370 horse motors.

 

I guess I got somewhat of a rare find. When I was researching earlier. It only gave me 68-69 for the casting number on the heads. Well With more investigation the heads are 70 date coded.


Thanks. and These are 2.02 in, 1.60 ex