I used a 1980 Ford Fairmont MC at 7/8″ bore, fits nice but I am not happy with the “long” pedal.[/quote]
You can trade M/C bore and/or pedal ratio for stroke, at the expense of pedal force. The M/C for a mid-70s AMC Hornet has RH ports and is about the same overall size as the Fairmont M/C. These are available in both 1″ and 1 1/16″ bore. This will reduce travel, but increase required pedal force.