For Formula-S/Rally status;
All the slanty suspension parts , and all the slanty brakes gotta go; every single piece except the control arms, and possibly the steering can stay if the tie-rods are good, but the drag-link has to clear your oilpan. That includes the T-bars, rear springs, shocks, and the K-member. And you will want to tighten up the steering box with additional reaction springs. With decent rear shocks and new bushings back there, I don't think you need a rear sway bar; I would adopt a wait and see on that. My car has never needed one for street, even with the narrowed rear and more vertical shocks. If you value your ride, get aluminum wheels; my two rear alloy-10s weigh IIRC less than one 10" steel Rally wheel.
