I'm going to look at an 87 F-350 on Friday that's for sale, to swap the whole drivetrain into my 84 Bronco project. I plan on using at least the 460, auto and t-case. What options did this truck have for a rear axle? And would that be worth replacing my (weak) Ford 9" to run 40-42" tires? I figure the front should be a Dana60 (woohoo!). THis truck is not a duallie, it's single wheels in back (SRW). JSM84