Hy Red63, Okay, thank you for describing what you are dealing with. If I remember that particular type of mounting correctly they had studs screwed into the master cylinder, it still is no picnic to put the nuts and lock washers on the studs inside the channel on the frame. If you put one nut on one stud to hold everything in place, then put the lock washer and nut on the other stud and tighten, now you can go back and remove the first nut and install the lock washer and nut and tighten, hope that helps.
