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#1
03-04-2022, 08:12 PM
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I’ve looked at the gap between the cylinders between a 400 vs 455 and there didn’t seem to be much different. Yet the STD bore on a 455 is larger. This does not take core shift into account.
I’ve heard 400’s going .060 with out to much issue, but I’m not sure I’d trust a 455 at .060. I think of a 455 as a 400 already .030 over. Sent from my iPhone using Tapatalk
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1979 Firebird Trans Am 301/4spd (Now 428) 1977 Firebird Formula 400/Auto 2007 Grand Prix GXP 5.3L |
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