I believe the reason if the hp / tq differences is with or without mechanical fan, and switched out should be the same numbers.

They are both the same m112 engines, should be nice and easy.
I have been looking on craigslist and fb marketplace for ppl parting out to find a descent engine, the scrap yards with mb want 2k - 5k for the engine alone.

If cams where a descent price then would help alot.
3.7, cams, tune, intake, some head work, would be over 300

Many 500's out there, but if there was a guide or list on things that need done for the swap to greatly decrease the down time, I would already have a 500 in it.