Disappointing dyno results

I do want to run my AVS. Based on numbers, I see why he want to run smaller carb but think he is going do the wrong path.
unless i missed it, you have a stock AVS no? those are rated at like 630cfm

the only 4 barrels smaller than that would be a holley 450 or 390

remember 340's came factory with 800cfm TQ's

it's not the carb. not with those numbers.