I'd be really surprised if the V6 trans bolts up to the 5.7. Even if it did, I wouldn't expect it to live very long.

I've heard that some of the stuff from a 4.7 swaps to a 5.7, but have no experience to back it up. At least a 4.7 was an option in an 05 Dakota. I can tell you nothing interchanges between a 5.7 and a 5.9 Magnum.

An 03 full size Ram still had a cable throttle that adapted to a 5.7, might be your best choice for that. We did a 5.7 from an 03 Ram, I can tell you that early 5.7 truck intake is a pretty strange looking thing, but it sets the throttle body back and lower then most of the other 5.7 intakes.

I think wiring is going to be your biggest challenge. Hot Wire has a stand alone 5.7 Hemi harness, but it ain't cheap.
Might be worth taking your question to the Modern Hemi forum here on Moparts. Those guys deal with these things a lot. Gene