The front brake kit you have is basically the same as a 1988-1996 C4 Corvette setup with the 13" HD rotors. This is what Baer has used for their "Track" kits for decades. The front calipers have twin-38mm pistons (A = 3.53 sq in) and as such will require a relatively small bore master cylinder in order to work properly. How small should be determined by the booster you're running (which you didn't specify) and the vacuum levels being supplied to it, however I would think a 15/16" bore unit is where you'll want to be in the end. Based on the peformance you've described, you're probably running the 1-1/8" bore C3 power disc/disc master cylinder now.
The Wilwood kit in the rear shouldn't be a problem, especially if you remove the OE disc/drum combination valve in favor of an adjustable proportioning valve. Most rear Wilwood kits using the 12.19" rotors and 4-piston Dynalite calipers have piston areas equal to 3.00 square inches. For comparison, the OE C4 Corvette piston area was ~2.47 sq in.
As long as the brake lines and hoses are not collapsed and restricting flow, they should not make any difference with respect to the caliper pressures as volume has no impact on pressure when treating brake fluid as an incompressible fluid, which it may as well be for the purpose of this conversation.
First step is to determine your MC bore. Next, post up the booster size and type that you're running, e.g. dual-7", dual-8", dual-9", single-9", single-10.75", etc.
The only thing that hasn't been brought up yet is pad compound, however that's something you can look at after fixing the major issues with your setup.
Tobin
KORE3
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