Residual Pressure Valve placement

OK brake gurus,

Finally got some time to plumb the new brake lines on the Duster. 72, Wilwood front disc/rear drum combo, new MC, Wilwood proportioning valve.

Adding a 10lbs residual pressure valve to rear drum line. Per Wilwood, it needs to be as close the MC as possible, and before the proportioning valve.

In an effort to minimize splices/conections, I'm thinking about screwing it right into the MC versus downstream. Inline. Any problem screwing it directly into the MC rear line port?

Thanks in advance,
Pat
View attachment 1715373342

Thanks as always folks. Did some research but wasn't able find a definitive answer. Does anyone know if the Rabestos #MC36406 has an integrated residual pressure valve? If so, I'll skip the Wilwood piece.

Thanks again!
Pat

The type of master you have is already a disc/drum master and should already have a residual valve in the front port. (That's what that type master is made for)
Screwing a residual valve direct into the master wont work without an adapter setup, and even then it could get snapped off pretty easy from sticking out so much.

Again, you don't need a residual valve for the rears with that master cylinder.