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

Can I ask why? surely 120 would be more than enough to power any ignition and accessories you may use.
I can operate a snowplow all day with heater and stereo on without a hiccup on subzero days with a 160 amp and good battery.
Are you operating a snowplow. lol
No lol, I went with what several shops recommended since I have quite a bit of amp draw from the fans/accessories etc and then there is the future nitrous setup. The potential exists for being close to maximum output with 120 amp max rated alternator at idle and I like to have room.