Heads up to those that install a 2 bolt aluminum master cylinder.

qkcuda said
I have a Mancini (made by Strange) aluminum master cylinder. The instructions that came with it say it is for 4 wheel disc brakes only. I will be using rear drums, so ended up purchasing an aluminum master for a 1980 Volare with manual disc/drum brakes. I checked the plastic reservoir and the large side of the reservoir is in the rear, which would be for the front brakes. I never checked the Mancini master to see if both sides of the reservoir were the same size.

These plastic reservoir units have two fill caps but I've found that if you fill one side, it fills the entire reservoir. There is probably a divider inside but also an open space to allow the fluid to equalize.