Well, the fittings on the master cylinder were seeping again...all eight of them. I am not sure what the problem is.
I removed the 8 brake lines and removed all of the AN elbows.
The elbows were soaked in solvent and cleaned with a nylon brush.
The master cylinders were dried with surgical swabs.
Loctite 567 was applied to the male threads and forced into the threads.
The master cylinders were dried once again, and the elbows installed and clocked. If they leak this time, there is a manufacturing defect in the master cylinders. I will be contacting Matco tomorrow to discuss this.
All hoses were reattached and tightened. I will wait 24 hours to fill with fluid. This will also provide time to talk to Matco.