Drum to Disc conversion

Hi,

I'm in the middle of putting Scarebird front disc's on my 69 Barracuda. I have a Raybestos MC36406 master cylinder to go on it that has a 15/16" bore.

Dual reservoir master cylinders came in, in 1967 as was mentioned. Disc brake masters have larger rear reservoirs and feed the front disc brakes. Disc brake calipers need more fluid to actuate than drum wheel cylinders.