Numbers Matching

YY1 said

It can be date code correct, though.

Better sources than me can explain that, though.

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If it's the original engine, or at least the right year engine, won't it be stamped 383 C or C 383 on the pad under the distributor? I'm not well versed on big blocks, but if I remember right, they were. C is 67, D is 68, E is 69, F is 70, etc.