Checking in to see if anybody has done the poly rebush job on their truck....I have a '93 1/2 ton 2wd....the bushing kits I have seen for my truck say to remove the steel cup that is associated with the original bushings such as the ones in the rear leaf spring eyes....seems to me if to removed the cups and installed the new poly bushings, there would be considerably more wear on the poly bushings.....the bushings would be getting all the direct movement from the leaf action...is there an alternative or is this the standard way to install them.....Thanks