750 Holley vs avs2 650 cfm carb for 340?

1970boy said
Hi looking to upgrade from my carter 1406 600cfm carburetor, looking to gain as much power as I can for the 340, was told different things by different mechanics so wanted to get more opinions, one recomended going straight to the 750 for a noticeable difference not sure if he meant a double pumper or not and the other said the 750 would be too big and I’d be better off with the avs2 650cfm carb. The car sees the street probably 4 days a week and rarely sees the track, either way I want the most bang for my buck to make the most power, what do you all think? Which carb will make me the most power? It’s a 340 with x heads an ld340 intake and hi-po exhaust manifolds with a 3.55 rear

Your best bang for the buck is tuning.
That's it.
You want new and shiny. That's differerent. You want boasting material, then bigger is better for those that are into that.
You want better response, or higher mph, or lower e/t then what you need to do is methodical testing.
When everything is tuned, and there's good fuel distribution to all the cylinders, a carb with less restiction equally well tuned will gain some mph in the quarter mile.