Like Erik, I've also got John Hervey's high-output alternator and it's working great. I take long trips with 100% confidence, but I got the big alternator because I spend a lot of time sitting in city traffic with the A/C running. At times like that I really appreaciate those extra amps. Of course I did not install it myself. The alternator, like all parts on my DeLorean, will probably last forever as long as I never try to work on it. - Mike Substelny VIN 01280