so far, the best bang for the buck for me has been a Powermaster PN 47768. Its shown as a 200amp but i have had 3 and they come with a dyno test sheet and the worst of the 3 tested at 231 amps and 139 @ idle. Not externaly reg. but great alt for the price. just trying to help. summit racing has them. they all ran between 14.6 and 14.9. my current one will run at 15.2 on fully charged batteries.. for a little bit anyway..