I'm running a powermaster alt on one of my cars and it definitely made a big difference at the low RPM areas...Ran the additional 8-10 gauge from alt to relay out in the engine bay...Then eliminated both amp gauge bulkhead terminals by running a new wire straight through the empty bulkhead holes for each....Re-wrapped the harness and you can't tell anything was done other than the extra terminal/fusible link at the relay...This still pretty much renders the amp gauge useless but you won't have open holes in the bulkhead connector ...Also,as stated you need to be smart about where you draw any new high amp circuits and keep them out in the engine bay with it's own dedicated fuse if possible...