Quote:
Originally Posted by RonC5
RITE!
Which is why I said "GM small block" refering to the generic Buick-Pontiac-Olds all-in-one motors used in that era.
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Rong again, there was only ONE block casting size for the Pontiac/Olds no matter what size the displacement was.....the head bolt pattern was the same, for all those engines....but not head/induction/appearance items.... this was true from 326 to 455 in the Poncho lineup.....in fact the only way to tell the CI was to look for raised cast numbers on the block....or the year/ci code like my last Goat had a B body '70 455 in it....YH code....
I think the Buick engine, especially their version of the 455 was a considerably lighter casting, which is why the Wildcats of the era were a surprise in performance compared to others.....but I know the head bolt pattern was different and so would be the block casting...
