I thought 390 seemed optimistic.
You're probably not wrong on that. I would love to have two carbs just for the cool factor, but with a limited budget, this being my only car and having an 80 mile round trip drive every day, it's not something I wanted to try right now. With the way I have my car set up, I average 25mpg driving relatively normal. 32mpg whenever I make the long highway drive to see my parents 2 hours away.