So I need to start a build thread I am telling you.

Looking at my '70 Cutlass closer and knowing it has 4 wheel power drum brakes (this is confirmed from data plates/ build sheet) it seems at some point in its life it received a new master cylinder. Now I have not worked on 4 wheel drums in a while, but I am fairly sure this master cylinder is for a front disk setup. I cannot find a number on it. It stops well and so far (1 left to check) all wheel cylinders are holding)
Thoughts? Yes it needs new fluid.