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Which engine is better to build a 388 or a 421 sbc?
I want to build a race engine but I can't figure out which one would be better a 388 or a 421. I have a set of heads for a small block chevy that I want to use. I got some info on them and they seem good so i want to use them. They are 55cc heads.
If you are using a production GM block the 388 would be the way to go.
Good Luck.....
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