Yeah, its the stocko alternator, (I'm hoping Tombutt can shed some light on the pulling config & for that matter the size of his alternator that he ripped out just to double check) but I'm pretty sure the GV alternators will fit and your correct it's about 80amps. Being a greedy bastard that i am the falcon one that is commonly modded to the sierra's is 110amp

But its a pain finding the Mitsubishi electrics ones which seems to be my only option going down that line. But if all else fails i'll have to settle for the GV alternator.