[patrickt]

OK, as a guess, I would say your headlights will draw 10 amps, your pusher fans will draw 10 amps, and your main puller fan will draw probably 20 amps, but that's just a guess. Your main line between the alternator and battery should be at least 10 gauge. Your tap off to the pushers could be 12 gauge the tap to the headlights could be 12 and the puller fan could be 10 gauge. Having a fatter wire won't hurt anything, it's just a little harder to work with. Other than that, it looks good.