thanks for speaking up Rocky!
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What I believe was the SR number was akin to a production block's Engine Serial Number. And the SR blocks were produced as an SR order arrived. So while no two SR blocks will have the same SR number, the SR number is only useful to Pontiac's internal paperwork at that time.
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Did you mean "Engine Unit Number"?
(if so, that makes a good amount of sense)
I sincerely appreciate you expanding upon what I had previously understood.
regarding this part of your post:
Quote:
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The block itself was constructed of whatever production block was available at that time
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That makes sense to a point;
The following two blocks seem to confuse things a little bit though - so could you offer an explanation as to why a "1967" or "1968" block was cast during the 1970 model year?
1967 block cast March 6th 1970
1968 block cast May 10th 1970
