Description:This HEI distributor for S/B and B/B Chevy non-computer controlled engines features:4-pin ignition module rated to 7500 rpmPremium cap with brass terminalsShaft Diameter: 1.249"High output coil (50,000 volt spark through 7,500 rpm) 4340 chromoly steel bottom gear, for use with cast and steel billet cams Mechanical advanceAdjustable vacuum advance to improve economy while cruisingHigh performance rotorCoil coverFully CNC machined, polished housingTrue spark alignment for instant response at high RPMPerformance style advance curve built inSold in Quantity EachTrigger Style Magnetic PickupAdvance Type VacuumCap Terminal Style HEI / MaleGear Material SteelRotor Rotation ClockwiseMechanical Tach Drive NoSlip Collar No
