Recommendations for jumpy suspension?

One thing you said early on in this thread " it pulls hard to the right when you are braking" That would indicate worn out upper ball joints. Also as MDJAY said ck the shim packs on the upper control arm. these are used to set the camber and would cause the noises and the pulling and the bad road follow that you are experiencing. As much positive camber as they can put in will help. stock spec called for 1/2-1 1/2 deg but 3 is better. Strut setups call for as much as 4 1/2 plus on a classic Mustang (from RRS)
 
let me know the name of the shop s-car, I havent been back to mustang ranch since about 5 years ago I went in looking for a reg 4 core radiator and they started trying to sell me some $700 aluminum yada yada yada....never went back after that.

Shim packs all looked tight still, but def worn spring perch bushings. Still just trying to decide on the final parts list to order from opentracker so I know how much to save. I only want to do this once and then enjoy it, I don't want to keep having messing with stuff. BTW, it pulls to the left under hard braking, but thanks for the tip, the neg wedge kit seems to put more strain on the ball joint rather than relieve it, you can see in the pics it looks like it puts a harder angle on it, it destroyed the rubber boot within a few thousand miles.
 
I've heard it said that if you grab the brakes at 12 o'clock and 6 o'clock and try to push them back and forth that they shouldn't move much. Supposedly doing the same thing at 9 o'clock and 3 o'clock checks the tie rods.