[bigblockcoupe]

i have a 130 amp alternator on my '93 and even with an underdrive pulley on the alternator it still make 14 volts at idle on an autometer gauge. i don't use the crank pulley because of my supercharger but i think the vortech one piece crank/blower pulley is underdriven and i have the water pump pulley on and have never had any trouble with any of it.