This alternator is designed to work with positive ground systems. These alternators will provide 100 amp maximum with around 55 amp at idle, depending on your idle RPM. It's a great upgrade for older 12V positive ground foreign vehicles also. This is a 1 wire setup so there is no need to worry about wiring a regulator. Just one cable from the alternator's output post to the vehicle's battery and you are finished.This is a Positive Ground Alternator. This alternator comes supplied with a 2 1/4" diameter pulley for use with 3/8" wide belts. We have many other options available. Please let us know the width of your belt (at its widest point) in the comments section during checkout so that we can provide this for you. The item "12 Volt 100 Amp POSITIVE GROUND 1 wire Alternator" is in sale since Monday, January 18, 2010. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Charging & Starting Systems\Other". The seller is "qualitypower1" and is located in Yucaipa, California. This item can be shipped worldwide.