Keep an eye on your local Craigslist or facebook marketplace for a 2wd Ram with a V10 automatic in it. You can get the whole truck for about a quarter of the price of the re-builds you listed.
Dump the 413 and put the V10 auto in your RV. You will be miles ahead.
If you still want to keep the 413, go to the autowrecker and they will do a search for you for a pre-1998 47rh. You will probably get one for under a thousand dollars and get a 30 day warranty.
If I had the time for a full swap with computers, mounts, gas tank pump and all I agree the V10 is a good motor.
I can put the 47RH in in an afternoon, and the 413 purrs and pulls great - 71 was the highest HP year.
My 97 B3500 has the 47RE with all upgrades and over 120k miles now on the rebuild. 200k on the OEM engine.
I do intend to check the yards nearby as I want some 90s Dodge captains chairs.
