My master cylinder for the clutch is an aftermarket unit that has 2 1/4” hole spacing. I believe the factory unit spacing is approximately 2 1/8”.
My pedal plate holes have both been elongated to allow the use of the aftermarket master cylinder. I believe the aluminum spacer’s purpose is to stabilize the bolts due to that elongation.
The bracket I made is no more than 1/16” thick so I doubt different length bolts would be needed for a stock assembly.
Therefore, the specifics of my bracket will not transfer to a stock assembly, but the concept certainly will.
Larry