Sleam
Explorer
Press new bushings in the frame as well -to remove the old bushings I usually use a 1" hole saw coming in from each side to remove what's left of the rubber and carefully split the outer steel sleeve with a hacksaw then drive it out.
Get a 12" length of 5/8 acme threaded rod and some acme nuts and big washers (source - McMaster-Carr) to press the bushing into the frame. Be sure to use anti-sieze on the id of the frame hole and check the frame for rust.
I'd go ahead and replace the Railko bushes too if it was my truck. Death Wobble is no fun.
If teh springs have sagged flat the Caster angle changes too.
This s great to know. Bit by bit, right? Also someone said the tires might be part of the problem, tall and narrow and who knows when last balanced (oh, and old too!). I think I'll check out getting other tires in the summer on credit. Narrow tires are more likely to get caught in the grooves on the roads is that right? They are 750x 16 I think. (From England when it was shipped over in 2005). Thanks for all your input, it helps me feel that I can do this. Patience is the key...