cast iron water pump /on 5.2 magnum ?

Rusty, out of curiosity, what vehicle is this in (or going in) that the alum pump won't fit? And, is that with a mech fan or elec?
1964 Dodge A100 pick up. I have a clutch fan /and shroud on it. I think that all the V8 A100's used the cast iron water pump. That's also why I need an intake that has less height than the magnum intakes :(