Brake problem??????????

[bagged69c10]

Most of you probably saw the 69 sub I just posted pics of. I put discs brakes on the front and when it was all said and done the pedal goes to the floor. Here is the list of everything replaced during this ordeal.

Master cylinder
Both rear wheel cylinders
rear rubber line
and all the front setup is a brand new kit from Mcgauyes (spelling?)

I took the proportioning valve off of my old 69 so I know it worked, and we switched out the booster that was on it for one that had been taken off another truck thinking that was the problem. The pedal still goes to the floor before it stops. I can pump it three times and the third pump the pedal feels solid and stops it. ANY help would be greatly appreciated.