Is there a stock type rubber bushing available for the upper control arms in the rear ? I know you can get a factory bushing for the axle side but I don't really want to pay 250 bux for a set of new control arms when I can just replace some rubber bushings for well under 100.

out of the boxes (need to weld the seams and do battle boxes if keeping the UCAs) and you NEED to do spherical heim joints at the chassis side or you will break something. The stock 4 link is kinda crap but I have seen ppl run good times with the spherical UCAs, a lot of reinforcing and a panhard bar to control side movement. You can even get rid of one of the UCAs if you run the panhard. I keep waiting for someone to come up with a kit that allows us to run a single centrally located UCA like the S197 guys to. The MM torque arm is really nice but its effing heavy and expensive. For a car trying for weight reduction its not exactly optimal.