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Can someone tell me a little about the 402 engine that was used in SS Chevelles. I was told that this engine was the substitue for 396's in the '70 model Chevelles. Are there any "big" pluses or minuses with respect to the 402? Thanks,
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[This message has been edited by ccrider (edited 08-18-99).]
 

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Beginning with the late '69 396 engines, I believe, the 396 came with a .030 overbore to make them 402's. They were still advertised and trimmed as 396's. The reason was debated at length on this site. If I remember correctly, the most believable reason had to do with emissions controls coupled with the lifting of the 400 cube GM limit on mid-size cars. You could do a search for that post. von
 

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CCrider ( the best rendition by Herbert Ledbetter aka Ledbelly IMO), I read here that block production went askew and they had to overbore them to get everything to clean up right. Sounds quite plausible.
 
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