Aaron,
what do you think about this idea I had....Take the gold "ball stud" washers and put them on all 4 screws BETWEEN the rear pivot block and the pivot plate. This would creat a gap and essentially lower the the rear bit of the chassis thus lowering the CG of the rear end.....it sounds confusing, but if you stare at your car long enough, you'll see what I'm talking about.
I dunno, just sound's interresting.