[Tom Cimino]

The way I understand it is the smaller the master cylinder bore, the less pedal pressure it takes to apply the brakes. This also increases the pedal travel. I too have dual master cylinder/balance bar, but with 3/4" bores. The brakes are marginal at best. If this theory holds true, the 7/8" and 1" bore sizes would require more pedal pressure, which in my case, would not be a good thing. Front brakes are Wilwood Dynalite and rear are Lincoln Mk 8 discs. Always looking for upgrade info.