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This is not the first time this has come up , the fact that it doesn't have a VIN points to a replacement block, without paperwork to back it up np saying what is going on in there .

OP , what is the SPD of the car ?



Don't know.. the guy sold the car the same time he sold me the motor and moved south. It's been sitting under my bench for 8 months and just started to check it out.



then it doesn't really matter I guess . It would have been a very late build car , like last week of production to get a 230 based 383 and only because there was no more 383 castings left to use. More than likely a warranty replacement block , couldn't have been the original or else the guy wouldn't have sold the car without it ???

Anyway at .060 it would need to be sonic checked before boring larger , at stock bore it would have been a nice block to build a 383 based race motor , assuming the bores were not core shifted bad , thick bores say rounder under power.