First, find out if you have a cast crank or a forged crank and see if the crank has been drilled for the pilot bearing fully. Most auto cranks that are cast aren’t, forged is hit and miss from my experience. If it’s not drilled, it’ll need to be or some have had success with pilot bearings out of Dakotas.
Then it’s simple as a flywheel (again cast or forged play a part as cast cranks normally are externally balanced and forged are internal, gotta get the correct flywheel. Then you just need the bellhousing, trans and you should be good.
Oh make sure your motor home 440 doesn’t have the funky motor home heads where the water pump flows into, those can’t be used in a car