Brake rod length

Having problem with front brakes. 68 Dart ,73 front upgrade and 10" 4 1/2 on 5 in the back. MC is for 73 up and rotors are 11" pretty standard stuff . My problem is pulsing peddle when I brake and a knocking on the right side. Slow brake not so bad but hard brake it really lopes .
nothing coming through the steering wheel. I had the brake guy out for the second time and he returned the drums and rotors . there was no change. Rotors aren't worped or cracked spindles are good , calipers are good. He's a very good brake man , in 35 yrs he said that he hasn't run across anything like this. One thing he did suggest was to check MC rod length my be too long.
any thoughts on this ?