OK so a friend of mine has a 250 amp alternator that he'll sell me for 200 bucks, its for 01-05 gm full size including the duramax. it will come with the wiring harness. my question is could i use this with my stock alternator (you know running duals ) i want to have as much power that i can get cause I've got big plans for my CB setup, something like a 1500 watt linear amp.