The front and rear axle shackles, pins, and bushings should be the same for 1 ton through 2 ton.
There are different length side plates for the front shackles available and I'm not sure which models used which, but you can reuse your old ones if needed, the pins and bushings are the same.
1 ton and larger have 2" front springs, same pins and bushings fit all.
3/4 and 1 ton have 2" rear springs, 1.5 and 2 ton have 2.5" rear springs... but they all use same rear spring hangers on the frame, shackles, and pins (spring bushings may be different length). The 2" springs use 1/2" spacer washers on the spring pins to take up the extra room.
With that understanding.. there may be different front pins and bushings. Some use nuts on the pins to attach the side plates. Some use a carriage bolt through the middle of the side plates.
Given a choice I buy the ones with nuts, even if not exactly original for my truck model, they're the better design.
Grigg
