[Fordestes]

It has been my experience that the water pump and fan run in the opposite direction, due to the serpentine drive , so that tells me the water pump and timing covers are diffrent, I read a post on line about this swap into a 65 mustang, they said they changed the whole timing cover assembly and had to install a new type timing pointer , you might google a small block ford swap
and see what all is new on the after market in the way of retrofit parts.
I do know for sure the balance has changed , so beware of swapping out
reciprocating parts,sounds like an interesting project.
keep us posted.
Fordestes,