A good friend of mine had a street belvedere he built on a budget. It was a stock 440 shortblock with ported 915 heads a tm7 a mild comp solid cam and 1 7/8 super comp hookers. He had a 440 Avs on the shelf so he used it. Car was a stock all steel belvedere street car and would run 7.50 at the track. Nothing fancy but a well sorted street car. People at the track would see the avs and say what kind of carb is that. Next thing out of their mouth would be I bet if you had a Holley it would pick it up at least a tenth. Long story short my friend tried it and bought a brand new 750 dp. After much tuning he finally matched et but never did get the Holley to 60' as good as the avs. His take was the Holley was a bit better on top end but throttle response and mid range performance along with mileage was better with the avs. He sold the Holley and kept the avs. My friend is a above average with his tuning abilities and I believe this is a good comparison of the two carbs.