So we are in love with our 86 F250. Regular cab, XL, 300 six, manual trans. But it would be a lot more capable with 4wd. In 86 the F250 2wd truck had coils in front like the 150. The F250 4wd had leafs. Soooooo which parts truck should I buy to convert mine over? A 150 4wd, 250 4wd or for fun the 350 4wd? I am thinking that any of the above from 80 through 96 would work?