Brake Booster Pushrod Adjustment
I've seen some references for 0.020" gap between the rod and MC. I unthreaded the rod from the booster completely and inserted it in the MC. I measured the length of the rod inserted in the MC from the mounting flange. I then threaded the rod back into the booster and adjusted it just shy of the length measured earlier from the flange of the booster. This should get it close. You want it so it isn't pushing the cylinder dragging the brakes and also don't want a large gap creating a soft pedal.
Got A Soft Pedal? Don't Forget The Booster Pin to Master Cylinder Gap