So I was putting my 370 to work....

Fountainhead

If the fluid level doesn't drop it's your master. If the fluid level drops it's your slave cylinder leaking.
If your fluid is dark or black and not clear, pull out the old and put more in there and over a few days or few drives change it our until it's clear.
If you have a lot of time, then get under it and bleed the old out and fill new in as it drops in master cylinder. (Pull out the old stuff before you start bleeding and add new Dot 3/4 fluid.
Use Google to look up "Ranger Protocol", he gives a better explanation.