I'm considering doing the same thing. 36 1/2 ton wheelbase is 112". Closest frame fit so far that I've found that MIGHT work is 84-88 Toyota extra cab short box,single cab long box or dbl cab short box. They are 112.2". I'm staying away from S-10 because of steering issues. I really only want 60 mph rather than 45 but there doesn't seem to be many solutions.