Right now I've got a Flex-a-lite electric fan wired up into the battery (yeah I know nto the best thing to do, I'll switch it soon), underdrive pullies on the crank and waterpump, and stock alternator, the battery is a Yellow top Optima. So can it be done? Yes. Is it best to wait till you get the new alternator? Yes. I haven't had any charging problems...yet. But its been running like that for about 5 months now. Car starts fine all the time. No problems either at night with A/C, stereo, fan, and lights on. The voltmeter is almost all the way down but hasn't died...yet. I will be installing a 3G 130amp PA alternator soon though, got some subs and amps going in so yeah definately need it now.