Right now i have a granada disc front setup, all manual. I plan on finishing the assembly of my 8", wich includes disc brakes from an 87 LSC, and power brakes. So... I was woundering what kind of proportioning valve and distribution block im going to need. I see alot of people use adjustable prop valves and whatnot. Anyone clue me in on this? How do adjustable proportioning valves work? are their slots they sit at, or is there like a screw you just turn at any point, it changes the proportion? Any info or a link to a page that can gimme a clue on what is goin on will be great. Thanks - Jacob