Blackjack,
Just a suggestion, but if you already have an alternator that will fit, then you could do what I did. I took my stock one in and had the insides replaced with a 100 Amp insides and everything has worked great for six years. We tested it 4 months ago and it still will put out the full 100 amps. That way I didn't have to go to the big, oversized ones they have in the auto stores around here.
Ron