I have a 75 tubed Vette with a 532 blower motor. Go fast, but doesn't stop very well. I have been throwing money at it by buying Wilwood master cylinder (tried and 1 1/8 in bore, as well at a 7/8 bore, Wilwood rear disc, brakes and stock Vette brakes on the front. Nothing seems to work. I do not have a vacuum booster or a perportion valve. I've heard because it had power brakes that I need a different pivot point for the brake pedal. Looking for some good advise from a racer that has gone through this thing before. The brakes are so bad it is dangerous to drive it.