I wouldnt mind some pics of the rears if you wouldnt mind. If that is what it is going to cost to upgrade the rears, then I'll just leave those stock or swap them out for some lighter grand am brakes and do F-body brakes up front. Though I have concerns about the mushy feel of the F-body brakes with its dual piston set up.
We'll see. Drop 20#'s or so with the Grand Am brakes and install SS lines or do dual piston F-body brakes up fron with SS Lines and hope that corrects some of the mushiness.