I just finished up a major build up on my 1987 Camaro Z28.
Swapped out the 10 bolt 2.73 Posi drum rear for an Aussie 9 bolt 3.27 posi disk rear with the aluminum PBR calipers and 11.65 in rotors.
Suspension wise in the rear, I went with UMI non-adjustable lower control arms, thier on-the-car adjustable panhard bar, along with Eibach Pro-Kit springs and Bilstien Sport spec shocks.
Front got some of the same treatment. The brakes were upgraded to Corvette C4 HD brakes. 13 inch rotors with big 2 piston aluminum calipers replaces the wimpy 10 inch rotors and 1 pistion iron calipers. The rotors are slotted and drilled..not a huge fan of that, but it came with teh kit and the rotors are high quality not junk. I also put Bilstien struts up front with Eibach's.
I capped it off this weekend with a nice set of ZR1's with 17x9 up front and 17x11 in the rear. I have some more work on the wheels, I think ill change up the wheel adapters, but everything is working out great. Tires are BFG's KDW's up front, 275/40-17 and in the year BFG KD's 315/35-17.