In those links, I saw alternators with ratings between 160-350 amps! I wonder how they manage to get that much power out of one of those with a stock case that originally had about 130 amps? The ones that I have are rated at 225-275 amps. I have a rebuilder test them, and said that his machine didn't go that high, so he couldn't verify the exact output. He told me that the rotors are stock, but the stators are custom wound. For some reason, the rotors in the ones that I bought only lasted about a month, and I had to replace them with stock ones. The rebuilder charged me $50 a rotor. The brushes, and holders burned out within a year too, and were replaced with stock ones. He said that those parts were also stock parts. This makes me think that if you order a performance stator, and diode trio, and just add it to your stock alternator, you could probably get a high current alternator at a much lower cost. I assume that the diode trio is not stock, since it has to handle twice to three times the amount of current. AlDive has a write up on a performance pulley for about $40 that makes the alternator turn a little faster at idle, and at higher rpms to avoid a low voltage situation while at idle. The pulley is a little smaller than the stock one, so you would need a smaller belt.