One of the better-looking finds I've seen here! There are plenty of parts available and plenty of willing help here. I didn't own a Dodge-based RV, but had a '71 B300 window van for 21 years and a lot of projects on it. So I watch here from time to time and help when I can.
Swapped 318 engine for 360, learning the bigger engines 383 and 440 use a different cross-member!
Upgraded front brakes to disc, which you already have
Rebuilt front suspension a couple times
Replaced several transmissions. With that comes my first warning:
Torque Converter must be a "truck" converter, which I think is referred to as "low stall." If you install an automotive one, you'll accelerate faster because of the torque multiplication in "high stall" converters. BUT the RV presents such a load at cruising speed, that the converter will continue to slip, overheating and burning out the transmission.
