I have a 1951 1 ton dually. I'd be happy to help with any measurements you need for comparison. I can say that the frame rails on my truck are 33" centers (36" outside to outside) which is the same as the early 80's Chevy's. My rails are flat, while the newer ones have a hump over the axle (like the 1/2 tons). You can still find these trucks pretty cheap, and used parts are available, because most guys are going the opposite direction and making them look like 1/2 or 3/4 tons. As far as parts availability and pricing,....most of my stuff is in stock at the local NAPA. Good luck and have fun!
