need some help before i drive this car off a cliff.

okay heres the deal. I have Replaced EVERYTHING in the brake system.

New master cylinder
New proportioning valve
New Brake lines (hard and soft)
New wheel cylinders
New Calipers

i just cant get a pedal no matter what i do. I checked every brake line connection 10 times and they are TIGHT. Ive bled and bled and bled and bled. Then i went and got one of those vacuum pump things and bled that way to no avail. I'm starting to think maybe my master is the wrong one maybe. When i replaced it i noticed i have little to no pressure to the rear brakes. which one should i have? I have a 73 dart swinger with a 318, a/c, power disc brakes, 10x2 1/2? drums and my proportioning valve includes the hold off valve i believe. I don't have the Texas shaped hold off valve. The master i bought is A-1 CARDONE Part # 101571.

somebody help me give never had this much trouble with anything ever its like the car is cursed!