I like your FI set-up and have thought about doing something similar only port injection instead of TBI. One thing I was surprised about was you fuel mileage. I would expect a little better maybe in the 18-19 mpg. I thought maybe the Tecumseh/York/Ford compressor was holding you back. Maybe a low power usage variable displacement compressor would improve your mileage. The latest design compressor's use up far less horsepower and performance is better. Anyway just a thought. Great job on your set-up.