Too much time wasted on a single aspect of the projects. I'm running a 1916 Edelbrock Avs2. The 1906 and the 1916 have different annular discharge venturi secondaries. The 1916 is advertised as as close as FI as you can get with a carb. I have run both versions and I agree with the ad. Who else is running the 1915 16 or the 800 cfm version and what are your thoughts on it's affect on mileage and performance?