This distributor features a 7.2 amp rated module and a 50,000 volt rated .35ohm primary resistant coil. This distributor produces 42% more energy in the coil with 46% faster spark breakdown time allowing 48% more peak current to reach the spark plug. This distributor also feaathures a vacuum lockout and welded mechanical advance to improve timing stability and mechanical reliability. Notes :Will fit 1985 and up roller cam engines but requires a different drive gear. This distributor features a 7.2 amp rated module and a 50,000 volt rated .35ohm primary resistant coil. This distributor produces 42% more energy in the coil with 46% faster spark breakdown time allowing 48% more peak current to reach the spark plug. This distributor also feaathures a vacuum lockout and welded mechanical advance to improve timing stability and mechanical reliability. Notes :Will fit 1985 and up roller cam engines but requires a different drive gear.