Yes
1/2 , 3/4 and 1 ton is all the same sheet metals except the box
The box parts are all subtly different because the way the boards attach and the stiffening bar ribs snd the longer boxes etc
Tail gate is the same back fenders same
Back bumper for a 1 ton is extra thick like it’s front bumper but is ultra Uber rare the 1/2 and 3/4 ton bumpers are like 3/16 thick it’s not exact but the 1 ton front is almost 1/4 inch thick and so is the matching rear
But it’s so rare the parts books don’t even list it and that bugs me to no extent
If anyone had a genuine 1 ton rear bumper I would pay more money that you think is reasonable for it.
-s