Proform Polished Performance HEI Distributor Chevy V 8 Electric Fuel Pressure Gauge Features:Designed for use in marine GM G Body 1978 Features:Designed for use in marine applications with Chevy V8 automotive enginesBlack anodized for great looks and corrosion resistanceWill not accept a vacuum advance canisterSupplied with a bolt down HEI style distributor cap and rotorWeathertight connectors are used for locked and sealed connectionsMust be used with an MSD Ignition ControlO ring seals can be added to modified blocks to improve oil pressure controlSpecial oil tract improves lubrication to the distributor and cam gearNylon pads ensure smooth operation of the advance weightsAdvance weight pins are staked and tig welded to the plateMechanical advance assembly can be locked out for crank trigger systemsAdvance 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 bearing and extra long sintered bushingMaintenance free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm rangeEasy to adjust mechanical advance with supplied springs and stop bushingsCNC machined billet aluminum housing and billet aluminum base with two flame arrestor holes with brass screensUL Approved OFF ROAD RUGGEDNESS Purpose built for all terrain use a high performance curve It also offers true spark alignment for instantaneous response