For Chevy C10 C20/GMC C15 C1500 1963-1972. Universal Disc Drum Brake Proportioning Valve w/ Lines PV4 for GM Chevy Buick. 2x 6 holes adjustable Anti Squat Brackets. Compatible drop height: 6" plus. NOTE: for trucks lowered 6" or more if runing a one piece driveshaft.
