For those guys considering paying big bucks ($200+) for a high amp alternator, you can get your existing one rebuilt at a higher amperage, somewhat cheaper. I took mine to my local alternator shop, where it was bumped from 100amps to 160amps(new stator, etc.), for $165,parts and labor. Fully warranted for 1 year. Only if I turn EVERYTHING on, will it drop below 12 volts at idle. It is MUCH better than before, but I am still going to add some better grounds, to see if that helps the idle situation.
Bill