the donor truck was a 1989 f350 reg cab long bed 4x4. you can use any f350 4x4 from years 1986-1991. those are the years with the king pin dana 60. i basically took the front axle, leaf springs and hangers from the f350 and installed on my bronco. the frame width on bronco, f150, f250, f350 from 1980 to 1996 are the same. so its almost a bolt on kit. you do have to do a little measuring and drilling holes, knocking out rivots. but you get my point. you also want to do a shackle reverse in the front. in which you will need the two hangers from the front of the rear leaf springs. make since? you can use the ones off the donor truck or get some from the junk yard. good luck hit me up if you have any more questions..........:beer