Not Ranked
.030 for a block seems to be ok. I see 428's go .060 with a sonic check no problem. It depends on the block and core shift involved. Cranks at .020 can still go more without any issues with .030 ideal. As long as these parts are clean without deep scores you should be ok but the machine shop will know the best. You can look into the Scat cranks if you can't find anything to suit your needs. G.
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