As gumbi said, get it running and driving safely. Put a few miles on it before you decide to hack it up. If you are a skilled fabricator you can put the body on any frame you want to. There are also kits to upgrade suspension and drivetrain components. One ton stuff is a little harder to find but it’s out there. ðŸ›
I know I want to get a truck bed and rear fenders , not sure how much difference there is in the frame of a 1 ton v 1/2 & 3/4 ton