Gil, the Z51 option was replaced in 1991 with the Z07 option, which included KC4 (engine oil cooler for the L98 - which you don't have in '96), FX3 (selective ride and handling), heavy-duty springs, shocks stabilizers and bushings, and heavy-duty brakes. It also included P275/40ZR17/N black-lettered tires, required AG1 (power driver seat) and AG2 (power passenger seat) - don't ask me why?, and required G92 (performance axle ratio) if you were getting it with an automatic transmission-equipped car.
This information comes from my Black Book which is dated 1995. But then, I've got an '87 so what does it matter for me, eh? :L
It should apply to your set-up if you have Z07, and I should update my Black Book.
Thanks for the info Tom. I race the car in super stock class and a sore loser said my car wasn`t legal because it didn`t have the brake upgrade.I argued that the larger brakes only came on a grand sport. not in the z51 option. Is that correct. I tried to reason with the guy that the smaller brakes were a disadvantage to his grand sport anyway.Go Figure!