One difference is the price. The fronts are cheap. The rears are not. I can not beat the guys prices who is selling the fronts. I am not sure of reman brand quality. However at that price buy them. Mine are Auto Specialty for the fronts. I sold 2-3 sets for 39 plus shipping.
Now for the rears I have the Beck Arnley brand which retails for about 140 each side.
APPLICATION INDEX APPLICATION SEARCH BUYER'S GUIDE VIEW CART Beck-Arnley Products Catalog - Part Detail


Part NumberDescription079-0249Loaded Caliper, RemanufacturedNotes
- Position - Left
- 2 Wheel Steering
©2006 Beck/Arnley Worldparts
These are loaded and are their top of the line calipers.
125 for both sides plus 15 shipping.
I think I have about 4 sets on a truck with about 1000lbs of other parts heading to me now. New GT seats and sliders included.
I did a quick search on ebay and found no rears ones listed.
Sick, the harness I got for you will be here Monday. I will send you pics. It is a turbo 90-92. Look at yours so when you get the pics you can compare.