i just did the drum to disk swap and need to know if i can still use the stock proportioning valve? how much diffrent are they? i got one with the rear end, but the numbers seem to match what i already have on the car.

I've never seen any numbers on the prop valves that identify them. The internals are mildly different. If you run with the wrong valve your front/rear bias will potentially be all wrong.

thanks i changed it anyway, i opened the cap and saw the fluid was nasty so i figured i would do it anyway