Re: want rear discs on 93, what axle and where?
Your ABS tone ring is attached right next to your ring gear, and if you plan on keeping yer ABS, then a custom 9" will have to be made for you. I also read on Randy's Ring & Pinion's site (ring-pinion.com) that all ford trucks with the LCD odometer use the tone ring/ABS system in the rear axle for the speedometer/odometer. The guy I talked to there (while discussing gears, lockers, etc) also mentioned Stainless Steel Brakes in upstate NY (Between Batavia and Buffalo), and their kits being well-designed and easy to bolt on. They usually run around $500. The 8.8" rearend is pleanty strong enough for most applications, anyway. And, adding the disc brakes to the rear will hold the axle in place if you snap one of those 31 spline axles. (Not that likely unless yer runnin some largely sized tires.)
1994 Ford Bronco XLT - 302cid, E4OD, 32x11.5x15 Dunlop Rover RV, Rancho RS5000