Re: Why do they call the 4" bore 283 a 301?
Because a 283 CID starts out as 3.875" bored out an eighth inch (3.995" diameter) is a 300.8 CID rounded up to 301 CID.
A 302 CID block is starts out as a 4.000" diameter and is a 301.56" rounded up to 302 CID.
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