SBC Head Identification

Asked by wtomtaylor300 Apr 21, 2020 at 07:01 PM about the 1955 Chevrolet Bel Air

Question type: General

I have a 55 Bel Air with an engine from a 62 (I think)
Corvette. Block casting number is for a 327 cid per
available charts.
Heads however tell me two different stories.
Markings on end of heads are two vertical bars over
a rectangle. Most internet info identifies these heads
are from 56 corvette (code D). But number cast on
heads are 376445. Internet info says this is a small
valve head for a 350 cid engine produced in77-84
What do I  need to do to realy identify these heads?

1 Answer


I think you have already identified the heads. But, why would it matter? The mill mark on the front of the heads as you described it points to a generic 300 hp 327, and there are LOTS of them. Might also be a 300 hp 350. These generic base engines were available in all Chevys including the "62 Vette and up, and were not really Corvette engines as they were made for any car that the 327 was available in..... If interest is that strong, why don't you just remove the heads and measure them. You can then tell if they fit properly with the block and you can modify them if you want.

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