Quote:
Originally Posted by 69hardtop
Don’t know if this helps or not, but for comparison here are stamps on my 1970 455 HO block
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Notice that all the digits are stamped in a nice, straight line. Gang stamped.
Mike's YA block was very obviously hand stamped by someone. In the Corvette world, that would be described as a 'forced match'.
Hopefully the YA block is at least a 9799140 casting.