69 Master cylinder bore size?

[69 DIRTY RAT]

I put this thread in pre 84 as well !

Any knowledgable brake guys out there?

I need to know what size the bore is on a standard master cylinder on my 69? And what size bore is on a C6 master cylinder?

Basically I need a new/aftermarket master cylinder because now that I have C6 calipers on the front rotors the pedal is going almost to the floor! I need to work out what size master cylinder/bore I need to bring the pedal back to normal?
;42