[Crude dude]

I dont know if any of you guys have done the master cylinder upgrade from a stock manual master cylinder to the 1984 Dodge Ramcharger master cylinder? I did this conversion along with Chevy front disc brakes and a TSM rear disc brake setup and WOW it works good. But lately one of my friends asked me if I pulled the residual pressure valve out of the master cylinder. I did not. Today I looked in there and pulled the brass flare and there was nothing behind it. Anyone else do this conversion? Im pretty sure that this is a disc/drum master cylinder and I do not want to tear up my goods. Thanks!