Alternator Upgrade

[CODY_YARBER07]

As some may know from reading my other posts, I have an '83 Stars and Stripes and am upgrading the sound system. I have two Wetsounds Pro 80's (Tower), 4 Polk Momo's (Interior), and A Polk Momo sub. These draw quite a bit of power and my stock 30 amp alternator will not cut it. I was wondering if anyone knew what my options were. I have heard that I can take the stock alternator and have it upgraded but I'm not sure how much they can upgrade it and how much it will cost. Any info would be greatly appreciated.

Thanks, Cody