I have the proportioning valve for the disc set up but it's out of a '72 Charger and going into a '72 Challenger, will this matter? Will the valve need to be rebuilt or serviced? Who ever removed the proportioning valve simply cut the brake lines with a side cutter and threw it in a box along with all the other disc brake parts. I an simply bolt this proportioning valve into my Challenger and expectit to work after all these years of just sitting on a shelf?