If you change the ratio either by changing the length of the levers or if by changing diameter for hydraulic action the stroke will also change, however it will not be noticeable since once you hit that pressure point it will feel solid.

My old 1965 REO truck was semi tired big but had hydraulic brakes....not sure if it had a booster or not.

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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.