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Do you know what year NASCAR went to the 355 rule? Was it '71?




I think there were 355 and big blocks running together in various makes during transition. The backmarker independents ran older equiptment. IIRC, something like 1975. I have some articles that talks about Petty switching, but not handy to me right now.

I have a 74 Petty Engineering Catalog that has RB and Hemi stuff only in it.