Brake Question

[shadowgray396]

It replaces the factory distribution block on the frame. Also since this is a '70 that you are working on that had rear drums brakes there may be a pressure hold back valve mounted back by the inside frame rail on the rear frame. Not sure on the Elkys if they had them, but 70 Chevelle had one hidden back there. GM did away with it with the combo valve used in model year '71 and up.