I have a question regarding the brake system in my 34 ford coupe. I have gm intermediate disk brakes up front and 11 inch ford drum brakes in the rear. The brake pedal is floor mounted with a 7 inch single diaphragm brake booster and a corvette style disk/disk type master cylinder( 1 inch).My problem is that I am unable to lock up the brakes. I have a 2 lb residual valve going to the front brakes and a 10 lb valve in the rear brake line. I also have an adjustable proportioning valve in the rear brake line. I have bench bled the master cylinder and power bled the system. I also need to know if on a disk/disk master cylinder does it make any difference which line coming off the master goes to the front or rear brakes would appreciate any info.