Join Date: Dec 1999
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Re: How to tell if I received my original engine?
they are all visually the same, but you cant bore a 304 into a 401, or even bore a 360 into a 401. the cylinder walls arent thick enough
so really there are 304 blocks, 360 blocks, and 401 blocks, not counting the older 290,343,390 blocks
a virgin bore 401 is worth quite a bit!