1965 Valiant 200 convertible (minor project)
OK, not to beat a dead horse, but it is correct that forged crank and cast crank blocks are different? Does the "330" casting number mean a forged block? So the OP has a forged crank 1980 slant six motor?
Guess now he needs to pull the valve cover and see if he has hydraulic or solid lifters.
And like you posted earlier, how is the late motor hooked to an early trans? Or maybe it has a later trans, too?