oooo so the whiteline and kartboy kits are just a step blow the psrs system? instead of the psrs peice they use bushings? is that what you are telling me? and would it be wise if i made my own bushings for the rear diff bushings inserts because i have left over polyurethane bushgings from my energy suspension kit i got for my old car and im pretty sure if i trimmed them down i could make them fit do you think this would be wise?