Originally Posted by
squirlz Bushings for the beam where they attach to the chassis, and all 3 of the multi link part of the beam. ES lists a part number but no one sells them. 7.3120 is what they say but i can not find them anywhere? If anyone knows where to find them that would be the best option.
I think there are polyurethane replacement bushings for the rear trailing link bushings (part 55045 in the diagram below). I want to say SuperPro or someone makes them.
I'm not sure how much void area is in those bushings, but if you really want to, you can poly fill every one except part 55135. That one needs to have a decent amount of compliance in it to make the whole locating linkage (the Scott-Russel linkage) work properly.
As for the actual compound, I recommend two-part pourable polyurethane casting compound over the single-part stuff that comes in tubes. I've used McMaster-Carr part #8644K18 (Flexible Urethane Casting Compound 1 Pound Liquid, Shore A 94). A 1 lb can is like $35 from
their site and there's enough in there to do all of those bushings plus all four engine / transmission mounts.
Good luck.