you can probably use the engine block casting number along with the cylinder head casting number,a combination of the 2 or one or the other.call an established 3800 building house and they should be able to tell you.
HP? dont know? might spool up a little quicker
swap? I wonder too? Might have everything to do with the engine block casting.Just like an engine block has to be matched to the timing cover to work, so too might the crank.