Leaky adjustable proportioning valve
this adjustable valve came with the disc brake kit i got from the right stuff detail [www.getdiscbrakes.com,] the valve and brass fittings and brake lines so hopfully they are of the same thread type, i think i will try the yellow natural gas type teflon tape first before i try the high temp. Permatex thread sealant, i do know some of the brake lines they supplied also had what looked like some type of thread sealant.