Mike, dial those accel pumps back until it falls on it's face, then open them a tiny amount. You want the minimum accel fuel spray until the fuel gets drawn from the well by the speeding-up air. That's how I set them.
According to John Connelly from aircooled.net, it's OK for it to run lean at part throttle, up into the 15-17 range. There are some AFR threads on thesamba.com. Good reading. Cheers, glad you got it running well.