I used a 130 amp 3.0 Taurus alternator, I had to swap it to a V belt pulley, it required a little bit of machining which would probably cost under 20 bucks if you had to pay someone to do it. I also had to make a little conversion bracket to get it to bolt into the slotted adjustment bracket on the 2.9. I had no issues with it in the 130 amp configuration and recently had it rebuilt to 200 amps, the only complaint I have with it is the belt life is not that great, I can get about a year out of a good belt.