Reading the comments on here the high amp Alternator sounds like a good replacement
Dan
Well.....since you kind of asked. I don't wish to throw cold water on your situation, but I feel obliged to relate my experiences with them. I got one a few years back. The o-ring sucks, mine leaked almost immediately. If you use this alternator get a stock o-ring. Also check the tightness of the flange nut. Mine came loose in the first year and the drive started clanging around in there. Along with tightening it, I would also stake the nut just to be safe. Now onto the really good news. On my way to Roanoke last summer a bearing went out in it. Luckily I was near a good alternator shop in Amarillo and they did me good and rebuilt the whole unit in less than 5 hours of receiving it. I did have 40k on the alternator by this time. But, I think the reason these are so cheap on Amazon, EBay, etc. is they are probably being built in the FarEast with cheap labor and cheap materials. In my opinion buying the stock GW alternator for another $120 is well worth it. You do have to "clock" them, but that's pretty easy. (Don't have Serk do it though)
I only put this out there to inform you of my experience. I completely understand wanting to save some money. I believe mine was rebuilt with quality components, and I'm not worried about it now. But, one of the first things I did when I got back was to buy a GW unit as my backup.
One good thing about that alternator was that with the multiple times of having to remove and reinstall it, I was pretty quick doing it in the dark of night in a Motel 6 parking lot with minimal tools.

Best of luck to you.
