I'd like to find a set of aluminum or polyurethane bushings to replace the old rubber K frame bushings in my Diplomat. It's getting a 360 where a slant six once was, and since it's 450lbs lighter at the moment, now is a good time to change the bushings. I would be very grateful if someone could explain to me the safe, proper way of doing this. I'm sure I can figure it out, but any advice would be helpful. Thanks.