What a coincidence! I was just asking about this in the `70 - 72 gto lemans tech page about sr blocks versus original #s matching blocks, i understand that rare blocks like the ram iv would make a difference but what about the ram 3 or standard 400 blocks as far as the sr blocks and the orig. #s matching blocks? especially when the sr. blocks are within the warr. period on the build date of the car?
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