4 wheel disc master cylinder?

BillGrissom said
Old 4-bolt MC's did have different reservoirs for front disk vs drum cars. All newer 2-bolt MC's have a single reservoir for both, so maybe doesn't matter, though there is a wall between them in the reservoir.

That's what I was looking for. I was concerned about the tiny drum reservoir being used with discs. Sounds like a newer master is in my future.

Thanks.