Thinking of going clutch factory style radiator cooling fan..

CRUZE 418 said
No one has mentioned that the cast iron pump is 3/4" shorter than the aluminum pump. The respective inlets are on opposite sides also, so his radiator is wrong for a cast iron pump. I may be wrong, but do not think that you will get a clutch fan in there.

Here's an old thread how to shorten an alum pump, to replace the cast pump, to be able to the same rad outlet.
I often just move the rad outlet to the other side.

https://www.forabodiesonly.com/mopar/ams/how-to-short-nose-water-pump.141/