Quote:
Originally Posted by olddog
I have heard of the drill bit or allen wrench test to see if a 390 block is a candidate to be bored to a 428. Even then it is a quick and dirty test (to rule blocks out) that should be followed up by sonic testing. What I have read is that the 427 blocks didn't have much extra meat. Sonic testing would be a must do in my warped mind.
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Agreed Sonic testing would be a mandate in this scenario.