Stinger has a new 325 amp alternator that is built for super duty/competition and is a drop in for most chevy '03-04 5.3. It has a cooling unit piggybacked to help dissipate the high heat levels that typically toast high output alternators. Eponylanche, this will definitely provide all the current you could ever dream of using!! Here is the link for those interested:
http://stingerelectronics.com/web/homepage_industrial.asp
http://stingerelectronics.com/web/homepage_industrial.asp