I'm getting ready to buy a front disc brake setup for my '68 Camaro. My brake guy recommended a 1 1/8" bore on the master cylinder and a 9" dual diaphram booster. Talking to various vendors, they recommend the 1" bore, stating the 1 1/8" would be too soft a pedal. Also, is it a big advantage to get bigger than stock rotors, i.e. 12"? Is a dual diaphram that much of an advantage over the single diaphram?

Thanks for any help I can get.

Ron