[Steeveedee]

That's right. Keith Seymour posted some charts for the various equipment for brakes. If the OP's truck doesn't have disc brakes, he should buy a disc brake master cylinder. imo. No telling what the current master is, and if it's currently a drum/drum system can't possibly be plumbed right for disc/drum. I ended up putting the Wilwood valve on my truck, like MikeB posted. The brakes work great.