73-76 proportion valve

If you are doing a disc brake conversion you can just use the one on the car now and add a 1970 chevelle brake hold off valve in the line going to the rear brakes. It is the same as Chrysler used on the a body in 1970 but it came with the bracket on it. Google it and get the brass one not the steel one. It is shaped kinda like Texas. All you have to do is just cut the line, flair it and install, your done. You should put the correct master cylinder on as well.