How many different casting numbers are there for aluminum BBC heads?

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How many different casting numbers are there for aluminum BBC heads?

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05-23-2019, 12:02 AM

L78racer

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Quote:

Originally Posted by Igosplut

I once had an 842 head that was a later GM issue (late 70s, early 80s I believe). It had a different texture to the cast (much different), and I could never find a mate to it

I have a pair of those. Texture is different. Several other things different on them but the basic head is the same.

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