I also found this alternator on Amazon that is similar to the other 200A ford 1-wire alternator:

http://www.amazon.com/Output-Alternator-Mustang-Connection-1965-1999/dp/B006I9GKK6/ref=sr_1_3?s=automotive&ie=UTF8&qid=1339547131&sr=1-3&keywords=250+amp+alternator

I just can't make up my mind, but I want to order something soon. The biggest drawback to any of these alternators versus the more expensive ($300+ car audio alternators) is the lack of idle charging current. These are all around 100A vs. 160A+ of the more expensive ones. These aren't going to hit 200-250A until around 2000 rpms.