Cylinder head question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cwilkie · 06-23-2005, 06:52 PM

I checked the casting number on my heads and it's 6272292, which translate into 1971 402/454 Oval Open chamber heads on my 1969 396 engine.

Does this matter...the hp rating on the 396bb are 310hp and the rating on the 402/454 cylinder heads are 240/270? My Father says the motor should have a lot more snap and he thinks it's because of the heads. Anyway, I am looking for the correct 396 heads.

The intake casting number is 3883948 = 1966-68 396bb 325hp. Does it matter if I get open or closed chamber heads? Which are better? Please let me know.

Chance

06-23-2005, 06:52 PM	#1
cwilkie Chance Join Date: Sep 2001 Location: Belcourt ,ND, USA Posts: 750	Cylinder head question I checked the casting number on my heads and it's 6272292, which translate into 1971 402/454 Oval Open chamber heads on my 1969 396 engine. Does this matter...the hp rating on the 396bb are 310hp and the rating on the 402/454 cylinder heads are 240/270? My Father says the motor should have a lot more snap and he thinks it's because of the heads. Anyway, I am looking for the correct 396 heads. The intake casting number is 3883948 = 1966-68 396bb 325hp. Does it matter if I get open or closed chamber heads? Which are better? Please let me know. Chance __________________ 1968 Chevrolet Stepside BB 396 w/TH400 1972 Chevrolet 3/4 Ton 4x4 BB 496 w/TH400



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