What are you folks using for a high outout alternator in your hotrods?

It's not how much the alternator will put out max, it's how much it puts out at idle. If you have your w/p,dual fans, fuel system, Ignition (like 1 amp per 1000 rpm) lights,wipers ,blower motor if you've got that,you need to add up there draw. if you're alternator isnt putting out what is being drawn you will kill your battery. I have a Power Master 180 mounted on a motor plate and it does like 80 amps at 1200 rpms. BTW a good cooling fan motor will draw like 40 amps....