Having figured out that my problems with brakes on my 52 Plymouth is most likely caused by an improper push rod adjustment I wondered if someone could tell me which way to move the push rod(I.E. lengthen or shorten it) to allow the brakes to return to the correct rest position. I am not sure what is meant by the hole in the Master Cylinder being plugged. I do see the hole, just cannot tell it it is blocked or not. Any advice appreciated.  Thanks.