One guy used these in a 1st gen 3 or 4 years ago but 1st gens had several different rear floor seat bracket configurations. The ones I always made are for brackets that bolt directly flat on the rear floor. Some 1st gens had brackets that mounted sideways against the side door wall or the transmission hump. Mine definitely won't work sideways. Sounds like you have a broken or stripped weld nut under that one bracket. Chances are that you cannot access it under the truck. There is probably a piece of sheet metal covering it. Might be worth going under the truck to attempt to put your hand on it. If the weld nut is broke you can fish it out and try getting a nut and washer under it to secure it. If the weld nut is stripped you can get a helicoil/tap kit and tap it out to run a helicoil in it to fix the threads.Do you do customizing for gen1
Not sure what's wrong with my driver seat!
When I reinstalled it years ago one of the bolts will not wrench down all the way and secure
I've tried rubber and plastic washers but it's still loosey in the back left side
Cornering is sometimes a pita