Milodon Large Volume Wet Sump Oil Pump High Pressure 3 4 in Inlet Big Block Chevy Pump Chevy V8 422993 Features:Pre installed Bronze Gear for aftermarket Size:X Small (40) Features:Pre installed Bronze Gear for aftermarket billet roller camshaftsGear machined from AMPCO 45 aluminum bronze containing 5% NickelCNC machined billet 6061 T6 aluminum housingMaintenance free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm rangeEasy to adjust mechanical advance with supplied springs and stop bushingsNylon 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 bearingMechanical advance assembly can be locked out for crank trigger systemsSupplied with Cap A Dapt and rotor (accepts MSD socket style caps)Must be used with an MSD Ignition Control Unique one piece construction makes installation quick and easy thread rolling gear tooth cutting