I have a mark 4, base kit( can’t get completes in Canada ). So I have been using donor parts from a 1995 GT. My issue is with terrible brake stop. Can’t lock brakes and if a sudden stop is needed would probably not be nice seen,slows down but no lock. Here is my setup, stock 1995 Gt front and rear caliper,rotors, pads and pedal box. I have no proportional valve,but did I stall a wilwood valve to adjust bias front rear which does nothing in my situation. The mod has been done to change pivot by 1 1/2 inches. No booster was installed, I even modified the push rod and made it adjustable. I can’t figure out what is wrong with my manual setup. So basically do I change master to different bore, or should I just find a way to put a booster, if so, which booster do I use, master cylinder, pedal must be returned original?