I had an 1850 on my engine. My brother had the 3310 laying around. One day I swapped on the 3310 & took a friend who was familiar with my car for a ride. He said there was so much change it felt like I'd put steeper gears in the rear. It really was an amazing difference. Maybe the 1850 wasn't set up quite right, but since then I've never trusted those formulas for figuring out the size carb you should run. Everything I've ever read says a 3310 is WAY too much carb for a 273.
