
Ride is certainly a lot more smoother but still not as stiff and stable as I would like, but it's another improvement.
Rear clunk noise when you disengage the clutch on an upshift / down shift; especially an upshift. when accelerating; the subframe is pulled away from the chassis via the wheel torque. when you push the clutch in, the subframe unloads and hits the chassis creating the thunk.
The rear of the car feeling like it steers itself. Probably best to do the rear pitman arms first before the subframe bushings if you have a self steering rear. or, at least have them inspected. If the pitman arms are good then this means the bushings are soft. No real way to inspect the bushings visually. however, if you support the subframe, you can easily remove the arm covering the bushing and see how torn it is.