Don’t give up on the Holley. Your a smart guy, do the research. Tuning a Holley for performance and mileage is 100% doable. It may take time but it’s worth the effort and the knowledge you gain from the experience is priceless. If There are countless threads on this site. Vizzards book on Holley tuning is awesome! Matt is a plethora of knowledge in Holley tuning. JMO