I don't know what the front track width is for the '72 but the pictures on hyatt's site show the issue with the front wheels sticking out past the fenders. It's a sharp looking truck but I want to try to keep my front wheels inside the fenders. I just bought a '60 1 ton rolling chassis that I want to try to use for my project. The manual shows the front track width to be 62". I think that might work okay. Also, the frame should be narrow enough for the cab to sit straddle of it without too much modification. I'm sure there'll be some fab work but that's the fun part to me. I'm not too crazy about making lots of changes either but I think that there's nothing wrong with taking a 1 1/2 ton grain truck that's headed for the scrapper and making something that you can drive around in. No too many people interested in driving 1 1/2 ton trucks to Wal Mart. If I stay with my current plans I'll put in a 292 six. Don't know about the transmission yet but it won't be an automatic. I hope to have a drivable truck that looks original. Definitely won't be a belly dragger.
