What is this?

Hmm... strange. that's a Mopar master (4 bolts, GM & Ford are 2 bolt), but it's a disc brake master, not that it matters too much. Just no residual valve in the port for the front brakes, but it's not absolutely necessary. I's be more concerned with how the (Ford?) proportioning valve was plumbed- if incorrect, that could have a whole bunch to do with why you're not getting any fluid into the lines and to the bleeders.