[dsraven]

maybe wanna check if the brake lines are connected to the correct ports on the master cyl as well. also balancing the whole brake system, master cyl size, booster size, pedal mechanical advantage, correct master cyl for disc/drum or drum/drum-whichever, residual valves in correct places-some masters have the residual valves still in after a rebuild, even though they are supposed to be disc/drum.
anyway, a complete check would be a good idea. ensure the system you have is actually what you need. master, prop valve, residual valve, brake bias with lining sizes front rear, etc.