I am working on a guy's 1999 2500ctd 4wd and I have put new master cylender, new hydroboost sys, new front pads, have bled the brakes and the pedal still goes to the floor. The brakes are not like they should be. . I have also jacked the rear up to see how the rears are and I cand hit the brake withit in second gear and it will bog the motor down but wont kill it like it should. . Can some one please help me I have spent 3 evenings on this thing and the brakes still stink??? Thanks Justin