I just got the new PST (Performance Suspension Technology) catalog! You should check out their NEW system for installing Corvette calipers and rotors on stock spindles. The kit includes 2 forged aluminum hubs, 2 billet aluminum caliper brackets, 2 brake hoses, bearings and oil seals, heavy duty screw-in wheel studs (1/2-20), harware kit, and instructions.
They say this one kit will allow you to use stock Corvette C5 or C6 calipers with the standard 12.8" rotors or the 13.4" Z51 package rotors. They also say that this kit will except the Z06 six piston monobloc calipers and the 14.0 Z06 rotors.
They claim that this one kit will except all three brake systems. You can start out with the 12.8" and upgrade later all the way to 14.0"
They say the 1978-88 G-body kit sells for $399.00,,,,,,,,BUT,,,,,,,,the kit is not compatible with cast spindles w/integral caliper mounts (Idon't know if stock spindles can be modified).
Just thought this system would be one more system to look at! They also have another system where you can up grade your factory disc brakes to their twin piston aluminum calipers and/or their slotted rotors, that will fit behind a 15" wheel.
Check them out if you think it might be worth looking into.
They,re selling kits from 1964 A-body Buicks to 1988 Pontiac G-bodies.
Doug