New Brake Master Cylinder Leak

[mgm60]

This seems pretty simple but I'm about to bust a gasket trying to stop this leak on a new Master Cylinder in my 36 Roadster. This started with upgrading the 48 Ford front brakes to the Boling Brothers 39-48 kit. While I was at it, I replaced the master cylinder and used the original outlet bolt, brass fitting and stop light switch. Leaked between the outlet fitting and new Master cylinder where pictured. Tried thread sealant on the outlet bolt and tightened with a BF Wrench. Leaked. Bought another new Master Cylinder, new outlet bolt, new outlet fitting and new stoplight switch. Used Permatex 54540 Hydraulic sealant and a couple of club members suggested I heat the copper washers so I did that too. Reinstalled. Leaks in the same spot. The bubble you see on the very bottom edge of the Master Cylinder is brake fluid.

Master Cylinder is located on a juice brake conversion bracket bolted to the X member and frame.

Suggestions?