Brake Issues, Yikes!

[ProTouring442]

Help!

Ok guys, this is the set up:

1956 Chevy convertible. We cut the front frame and installed the front sub from a 1979 Firebird. We also used the 8.5 rear from the same car.

The front rotors, calipers, and suspension is stock 1979 Firebird, all new.

The rear drums, wheel cylinders, etc are stock 1979 Firebird, all new.

The power booster, master cylinder, and combination valve are stock 1979 Firebird, all new.

The problem:

The car lacks brakes. Normal stopping seems ok, but you cannot lock either the front or the rears, no matter how hard you push the pedal. The pedal travels near to the floor when pushed very hard, and cracking either the front or rear lines loose allows the pedal to drop further, so it seems to me that nothing is bottomed out.

A little more info... I just took the car for a ride, and I can get the back brakes to lock, maybe the fronts, but only with an incredible amount of pressure. I am starting to thin it might be a pedal ratio or a master cylinder size issue.

So where do I go from here? Any thoughts?

Thanks!!!!!!!!

Shiny Side Up!
Bill