Tuff Stuff Performance Master Cylinder and Booster 1 in Bore Dual Integral Reservoir 11 in OD Dual Diaphragm Chrome GM Fullsize Truck 1970 92 29601610 BD's butterfly valve and rotating ENE5 5170G BD's butterfly valve and rotating shaft are made of stainless steel to resist corrosion 5 amp single spark through high rpm┬ ¼Î“ÇáEasy to adjust mechanical advance with supplied springs and stop bushings┬ ¼Î“ÇáVacuum advance canister for improved economy (can be locked out)┬ ¼Î“ÇáCNC machined billet aluminum housing and billet aluminum base┬ ¼Î“ÇáHousing is 5 8” smaller in diameter than stock Ford distributors┬ ¼Î“ÇáMaintenance free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm rangePolished steel shaft is QPQ coated and guided by a sealed ball bearing┬ ¼Î“ÇáAdvance plate and weights are fine blanked from chrome moly steel and QPQ coated for friction reduction┬ ¼Î“ÇáMechanical advance assembly can be locked out for crank trigger systemsAdvance weight pins are staked and tig welded to the plate┬ ¼Î“ÇáNylon pads ensure smooth operation of the advance weights┬ ¼Î“ÇáSupplied with small diameter cap with HEI style terminals and race rotor (will accept 8441 Cap A Dapt)Does not require an MSD Ignition ControlCARB E We specialize in Chrome Plated 100% all new components and every unit is vacuum tested to insure reliability