Out of curiosity, when you hooked up your booster, did you properly attach the linkage to the pedal by drilling a new hole?
I drilled a new hole on the pedal arm about 1” lower than the factory location to reduce the mechanical leverage. I really couldn’t tell much difference. Right now the pushrod is in the factory location on the pedal arm and both of my C10s are set up that way. The brakes perform very well and aren’t too touchy.
