I have just put aerospace rear drag brakes on the rear. Four piston 1.75 caliper. The car has Wilwood front drag brakes four piston 1.75 calipers. Do I need to change to a 1-1/8" bore master cylinder? And do I need a proportional valve and a 2 psi residential valve? Or will it work with the stock setup. The car is a 90 fox coupe.