the hydrovac will make a definite difference from regular brakes, hard as a rock, but if you can pump it up there's air in the system, "mechanical slack" will affect the travel on the first push [lower pedal] ... if the hydrovac is hooked up, have you bled that? could be air in that part of the system .... all those wheel cylinders are fulla fluid all the time, all the master has to do is move them a quarter inch or so
Bill
