I believe the bolt that attaches it to the brake lever is an eccentric and can be adjusted some. Just loosten the nut and turn the bolt until you have it where you want it and tighten.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.