the only electrical upgrade has been a CD player in the glove box, but no other sound system mods and the headlight harness was the only other "mod".
I've had problems with this alternator since I got it (Autozone)...I let the duster stretch out her legs and ran it up to 110 and after that the alternator was making noise...so I warrantied it out and have been having bad luck since then.
The voltage drop going to idle is immense..bad enough that the radio would turn off at night time if the headlights were on.