I was driving my 70 jeep, last year I put on a Dana 30 front axle with disk brakes. No problems since. The other day I noticed my brake pedal was getting mushy, and eventually I had no brakes! Got it home safely and began looking it over. The dual master cylinder was bone dry. I refilled it, and had the wife continously pump the brakes while I crawled around under it and inspected all of the joints for any sign of leakage. No go, at least nothing obvious. Before I take it in to a real mechanic, anything else I can check?