400 stroker or 440

Plik said

dump the 440 and go for the 451, Stronger block and it fits better in an A body.

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+1 and it will be a lighter package. You should get a good dollar for the 440 although you might want to find a 400 block first! I have both a 400 and 440 block and will be letting the latter go once the 400 block is machined.