Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - how far can u bore a 403 olds engine
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Old 05-12-2005, 07:19 AM
machine shop tom machine shop tom is offline
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383 is right, the block is a weak spot in highly stressing the 403. If your heads are not cracked, your best bet would be to bore it no more that .020", install a torque cam and perform some bowl clean-up.

tom
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