I have a 1990 GT that I've been building for the past 2 years and finally got it driving a few days ago. First I'll give specs on car then describe the problem and ask for help and advice. Car currently has SN95 spindles and balljoints, dual piston PBR calipers, cross drilled rotors and the steel braided lines from Maximum Motorsports for the conversion from stock hard lines to the PBR calipers. The rear is the stock brake drum setup with the exception of the Moser 5 lug axles. No the problem is that the brakes dont feel great and dont stop on a dime like I thought they would. It almost feels like the pedal isn't as firm as it should be or as if the rears are doing most of the work. I have not swapped the master cylinder or proportioning valve cause I didnt think it was needed. All the lines have been bled multiple times and are free of air and the rear brakes are in good adjustment. Im really lost as to what to even look for.