what master cylinder for disk/disk set up?

I made an adapter plate to convert the cars 4 bolt pattern to the master cylinders 2 bolt design. I used 1/2" aluminum plate.
Doctor Diff/Cass Eslick is a man to contact for this stuff. Also consider The Ram Man. Sorry, I have no links for these people, but a Google search should work.
In my case, Dr Diff sold me a lightweight 2 bolt aluminum master cylinder for my 4 wheel disc setup. I had power but the low engine vacuum made slow speed driving pretty dicey. I decided to return the car to a non power setup. The weight savings will probably be around 12 or more lbs. I installed the master yesterday but i have a leaky line that needs to be replaced. Oh, Dr Diff suggested to use a 4 wheel DRUM combination valve in a 4 wheel disc app.