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If the C6ME-A block turns out to be a 390 bore of 4.05 , can it be bored out to a 428 (4.13) sense it was used as a 390 and 428 ?
On the back of the block (flywheel side) there are the numbers 66 427, does that mean anything ? Or am I just wishing ? I dropped it off at the machine shop so mabe I will know at least what the bore is .
wld side
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