Getting air in the lines somehow

Due to the design of the seals air can get in a lot easier than fluid can get out, so not seeing a fluid leak isn't unusual but that said I have to agree that it does sound like the master has a problem from everything you have done, checked and described.
Dr.Diff 15/16 Aluminum MC is ordered. Right Stuff has yet to get back to me. Should of just ordered from Dr.Diff to begin with, he is much more thorough. Right stuff also doesn’t seem to have a great rep for customer service. Hopefully this is my problem and I’ll chock it up to ya get what you pay for. I really appreciate the responses fron all of you fellas, hopefully I’m on the right track and can get my ride running and stopping before MoPar Nats.