Thanks for the Wilwood numbers. I what to use 4 piston calipers on the front as well as the back.
With the stock brakes I have on it now the pedal is very stiff and it feel like it doesn't have any power assist at all. I have already change the 7" single diaphragm booster out for a dual with no success. I'm thinking about changing out the master cylinder to a small bore and adding a extra vacuum tank as I think the vacuum available is marginal.