First off - Happy Thanksgiving to all you Bolt'ers

I am going to be purchasing a new wiring harness for my project. I will have to also get an Alt or Gen. I am going to convert to 12v.

So what is better to go with a Generator or Alternator?

And how can I tell what pulley I should go with 7/16 or 3/8

this is a 48 chevy 216 engine in a 53 3100 SB

gotta go hunt my turkey now