360 truck rear-end compatible?

For those power levels I would keep looking for a 8.75 or a dana 60 if you stay mopar (I have no experience with the truck rear you have). Or a ford 9 inch. Even though I have a ford explorer 8,8 in my car I personally wouldn't trust it at those levels. If ford 9 inches are common in your area I would probably go with that.

Dont let narrowing a housing scare you, find someone local who does it.