I'm in the middle of a drum-to-disc (front) conversion on my 1967 Special. The car was originally equipped with power drum brakes. The kit I got came with this style of proportioning valve. https://www.inlinetube.com/products/pr102 Now, the confusion is, can I keep the original distribution block mounted on the frame rail connected and add the new PV between that and the master cyl? Or do I have to eliminate that original block on the frame and run new lines up to the new PV? My idea was to keep it so I wouldn't have to run new lines and also to keep the brake warning switch connected. Or does the warning light need to be connected to the new PV? The instructions for these new parts seem to be impossible to find.