i guess i will let it go for now.if i can dig out my old books out of my barn i will post the article that read about the 66 428 c6me block.the guy who wrote about it was a engine builder in the 70s -90s
I think that the old engine builder stuff you read was a load of crap, written by an overzealous tech fellow, especially based upon the earlier dates (70's) that were mentioned.
Although the engine builder may have overbored any number of C6ME blocks that doesn't mean they had thick walls. Instead, they likely had scary thin wall thicknesses, especially between each bore, that he had zero knowledge of (no easy sonic testing way back then), he got lucky, and they were mild street builds. Bet a buck he never had any really high hp drag or track engines that would bust through a thin wall in a heartbeat!
