What is the largest over bore you can go on a 402

08-15-2007, 04:00 AM

70-SS/RS-L78 70-SS/RS-L78 is offline

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Re: What is the largest over bore you can go on a

90 is a bit thin for street use on a 70 402 block, As Chuck mentioned I would sonic test it first. You will have overheating problems and cyl wall distortion (ring seating issues) if they get too thin.

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