Low volts at idle

I could have sworn that last time I had my dash apart the ammeter wasn't even hooked up! I'll have to check that out again. I'm running the square back design right now and my idle speed is around 800 rpm. The wires that connect to the alternator are the ones I replaced. And only upgrades as far as electrical is a CD player and a few gauges. I'll check out that artical and hopefully find some pointers. Thanks for the help! -kory