Brakes losing pressure at red lights, any ideas?

Converting is easy. They make these magical things known as "inverted flare plugs."

http://www.summitracing.com/parts/rnb-43160?seid=srese1&gclid=CMPfvsG158UCFY-TfgodJpgAZg

The trick is you will have to determine "what size" Often, at distribution points, the flare nuts are special nuts, that is, NOT the "standard" size matching the line. If they are, you will want "3/16" size

Pull the rear line coming out of your distribution block, and plug the block.

Either extend or make up a new like between the prop valve and the FRONT fitting on your new master.

Connect the REAR fitting on the new master to the old distribution block.

The two nuts for the master are likely to be special sizes. You will either have to round up nuts to fit the master.........likely different sizes front and rear........to fit 3/16 line

OR sometimes you can buy "step up" or "down" fittings.

ALL these fittings MUST be "inverted flare" No pipe thread.