boy oh boy, did them on a chevy s10 blazer it was sagging 1/4 - 1/2 inch. was a real bugger to close the door.. the trick i used was pull into garage, use 2 racheting straps thru door frame window to rafters to hold the door up when i pulled the pins to replace the bushings / pins


worked like a champ, i think the pins were only 5 bucks a set.at orielys auto parts

the hardest part was hanging the door from the rafters with the ratcheting strap, but it worked great, didnt have to disconect no wiring or nothing.

should work same for superduty