@John Bungen, to mount the dead pedal I just drilled and tapped holes in the frame tube from inside the car. I think I coated the drill bit with beeswax to prevent snagging the carpet. I had to rotate the base of the cutoff clutch pedal to get the angle right. I aligned the dead pedal with where the other pedals were at the time. Now I have increased the travel of the clutch and brake pedals so the dead pedal no longer lines up. For my leg length, it also might be better to have the dead pedal more toward the front of the car. However, that would also move it more toward the center of the car.
I actually don't use the dead pedal very often.
If you do a search you will find many different dead pedal solutions.