Alternator upgrade

I'm looking to get am alternator with a much higher output in my 1972 Plymouth fury III because, I recently got my hands on a couple of 15 inch 600w subwoofers. I'm also going to be replacing all the stock speakers with some kickers and I have a pioneer radio mounted under the dash.

I found this alternator on summit racing and I was wondering if it's any good?
1972 PLYMOUTH FURY III Powermaster 8-47539 Powermaster Street Alternators | Summit Racing