On an AD truck, the stop for the brake pedal is in the MC. Therefore you can adjust the height of the brake pedal using the rod adjustment. However once the pedal gets adjusted down sonmewhat it no longer turns of the brake switch and the brake lights stay on.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed

My Chevy Master 4 Door is on the Road!