MSD Pro Billet Ford Distributor 351W V8 4526LRGBK bushing style A arms are available The KC7 CMR is bushing style A arms are available with a steel or aluminum cross shaft and a straight or 10 Degree ball joint position 1971 1972 GMC C25 C2500 Suburban Features:CNC machined billet aluminum housing and Dupont Rynite baseNo CARB Exemption Order NumberSupplied with Cap A Dapt and rotor (accepts MSD socket style caps)Mechanical advance assembly can be locked out for crank trigger systemsNylon pads ensure smooth operation of the advance weightsAdvance weight pins are staked and tig welded to the plateAdvance plate and weights are fine blanked from chrome moly steel and QPQ coated for friction reductionPolished steel shaft is QPQ coated and guided by a sealed ball bearingMaintenance free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm rangeEasy to adjust mechanical advance with supplied springs and stop bushings Supplied with Cap A Dapt and rotor (accepts MSD socket style caps)