Quick video comparing a 4160 Holley 600 CFM carburetor to a Edelbrock 1406 600 CFM carburetor. Test mule is a 1975 Ford F250 w/390 FE. I test off-line acceleration, fuel economy and more in this video. Results were surprising(at least to me).

0:35 - Engine and driveline facts
1:14 - Carb calibration and tuning basics
1:37 - Test begins, Edelbrock carb
2:15 - Off line acceleration test, Edelbrock carb
2:43 - Fuel economy, Edelbrock carb
4:33 - Holley carb installed
4:40 - Initial impressions of Holley carb
5:09 - Off line acceleration, Holley
6:30 - Fuel economy test, Holley
9:18 - Fuel economy results, Holley
10:25 - Conclusion