thansk guys frot he mailing address. I searched all posts with "403." It seems as if a lot of people here know what they are talking about. I just can't understand how chevy can have flat-tops with 64cc chambers. I do realize the head designs may be different though.....So basically, has anyone here run flat tops on their 403(not with 83cc smog head). IF it won't work, I'll get some forged dished...
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