what size carb for a 416 stroker

FWIW, I would be looking at a HP series Holley or the like from another seller of carbs. The Avenger series carb has a lot of complaints. This may be due to inexperienced hands. I don’t know.

As far as carb size goes, I think we’re all missing a little bit of info. In post #2, Roy gives his combo. Also, what is your primary use of the car? If it is mostly street, I’d run a slightly smaller carb and not worry about that last few HP on top I’m leaving up top in favor of the increased throttle response that makes driving the car pleasant and responsive.