I have an 84 Ranger that I have converted to 97 Ranger twin piston front calipers, and I have also changed rear axle to 2000 explorer with disc brakes and 97 explorer master cylinder. I am going to be making all new brake lines and install a disc/disc proportioning vale. My question is, does the port on the rear of the master cylinder (closest to the fire wall) go to the front brakes or the rear brakes?