[POWERBRAKEBOB]

Those are beauties. However, one of the weaknesses of the C4 brakes is the Australian booster and master. The Dual dia vac booster is a huge improvement over the plastic booster. The problem here is the 7/8" master cylinder.
The piston size in the calipers is small. The C5 calipers are much larger pistons. Nice, but that requires a larger master cylinder to provide the needed volume. C5's and C6's used 1" masters. The bolt pattern on the C4 boosters does not allow for master cylinder upgrading.
Installing these large calipers without the 1" master and Delco dual dia booster GM needed to APPLY the larger calipers leaves you with a low mushy pedal.
Baer brakes made brackets years ago to install C4 calipers on Camaros thinking that was going to work for high powered stopping. It didn't. The 1.125" master used on Camaros and Chevelles could not spike the pressure high enough to improve the stopping power.
I met a guy years ago, that had installed twin calipers at each front wheel on his ZR-1. He complained that he had to pump the pedal twice each time to stop the car.
Her, I believe is the solution. The Bosch Hydroboost. It can accommodate any size GM master. I used a 1" here, because the booster has so much power.
Many experts think you just keep drilling holes in rotors or keep increasing the rotor diameter until absurdity.
Not so. PRESSURE is what stops the car. When a jetliner lands, you FEEL the brakes apply. HARD. Pilot is only on them for a few seconds at 160MPH.
In a car, if the rotors are overheating, the pressure is TOO LOW.
It's like pulling a rope thru your hands. It's going to keep burning until you squeeze it hard enough to stop the slipping.
Half way applying pads against a spinning rotor is much the same.