What do you want to do, go straight or hit the corners hard?
I would weld plates on the stock upper arms to brace them, or buy a good set of adjustable upper arms, Steeda, Metco etc.. The SSM lowers are more for going striaght they really don't help much in the corners, if you get them weld the torque boxes up and weld the plates to the axles if you bolt them in you will break them eventually. I run the Drag kit and it will not help you in the corners at all, it will transfer the weight better, the air bag is just a tuning device if the cars doesn't leave straight.
My dad runs the Steeda Adustable uppers and the lowers on his 93 Cobra I\he feels they are the best of both worlds, but they are a lot more expensive.
It all depends what you want to do, if you want to race 1/4 mile
DO NOT GET LOWERING SPRINGS they limit he travel of the suspension, don't forget about the subframe connecters
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My Ride Check Out My Site 91GT, Holley SysteMAX II Kit-Heads 2.02" x 1.60",Full MAC exhaust 1-5/8" Long tubes, 2-1/2" O.R H-Pipe, 2 1/2" cat back, 12" K&N Filter, RNH PERFORMANCE Ram Air, Ron Davis Radiator, Full Suspension,3:73's, Welds, Best on new motor-12.60 @ 108, no traction 1.98