72 Demon slanty-to-340 Resto

I see a lot of posts on the 100 and above amp alternators in these old cars. Can somebody school me on this. Why does one need a 130 amp alternator in one of these cars anyways. I put a 50A in, and enlarged my output wire to 8ga marine grade based on the length of run required, and bypassed the bulkhead. I plan on running everything as LED for effiency, except the headlamps because i hate the hokey looking LED lamps, i plan on a small stereo, and no electric fan. I prob actually could have gotten away with a 35A alt, 10ga wiring, and the bypass.

Are you putting in EFI, a big booming system with a cinder block sized amp, and maybe a killer CB system where you want to talk to people several states away. Look at the power requirements for what that your planning on adding.