Getting the old rubber bushings out is fairly easy--getting the new ones IN is the hard part!...without a press of some kind (A U-joint C-clamp tool works),it's a frustrating job...
Getting them out the easy way,is to just light the rubber ablaze with a propane torch and let it burn a few minutes,(if the spring is still in the truck,keep a water hose or fire extinguisher handy!)--then you can push out the rubber and metal inner sleeve with something like a screwdriver or large bolt,it'll be like putty...and then use a cold chisel to collapse the outer metal shell in some,until it comes out--or slit it with a hack saw or sawsall at the opening in the spring eye..
