[mr0077]

Dual fours have a big "wow" factor and are painless once they're dialed in (and dialing them in is pretty painless too). To maintain them requires learning a little bit more about how carbs work, but not much. I, too went with a single four and changed to dual fours...in my opinion, I lost nothing in the performance category and gained a lot in the bling category. I like the 390 cfm carbs for throttle response, but the 600's work well too.
You should put them on to start with if you like them.