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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Kentucky Gold 70 SS/RS L78.
81 Z/28 Silver/Silver Int
09 G8/GXP #992
98 Pontiac GTP Daytona Pace Car #605
90 Olds Touring Sedan SUPRCHRGD L32
83 El Camino
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