And another reason why baby carbs on hot motors suck, too peaky here, to sensitive there and why I'd put a proven Dommy on anything making over 500 hp and have for years with great results. Yes, my street cam is .680-.660 and 276-281 and idles and drives awesome with no issues anywhere in the power band BUT, it took time and patience to get there and yes, holes in blades are bypass air to smooth out rich idle/transition issues. I never said it's ok to drill blades in 4 barrels and I never do under any circumstances except like I said for high velocity 2-bbl dirt stuff.....