Eric has some good points there.....but be wary of eurethane bushes. True they are very hard wearing, but also very hard riding !
The only places you could put poly bushes in your truck is the spring eyelets.Remember this is the only thing insulating all the road shocks coming through your suspension and into the chassis of the truck.
New stock rubber will last an easy 20-30 years with care and provide a better ride than the worn originals.
A good place for eurethane bushes is on any lateral suspension components such as reaction and torque arms similar to early F@#& front ends', or on parts attached to a frame insulated from the chassis rails.
Best of luck with the truck Ed & many miles more.
