What's great about Holleys is that there is such a variety and you can keep trying different combo until you find the right one. What you like someone else may not.
Mind you, I am coming from a vastly different place compared to most.
I find the "wheel of carbs" to be annoying. There is a specific reason one works better than another.
I would rather change bleeds and make the fuel curve appropriate for my usage. The 650 double pumper mentioned, it seems like the right choice. Only negative is the majority of them have a tiny PVCR and oversized jets as they were meant for racing. For street car usage you will juggle between having a fat cruise and being underfueled at wide open throttle. The only solution is to drill PVCR's and jetting down, of course this brings us back to just make the carb work for your setup in which case who cares what you started with?
The only benefit of swapping to another carb would be that it being a generic vs a valuable original, you could molest it sufficiently to work perfectly in all conditions.
I simply like the 715cfm as the venturi to throttle bore size is very favorable in regard to optimal tube. (optimal tube being 30 degree inlet, 7 degree outlet, vena contracta being a specified fraction of the outlet).
All of this said, there is a very specific reason that Ford used the 1 5/16, 1 3/8 venturi, 1 11/16 bore combo on so many carbs.
C3-B, CU/CV, BC/BD, 3259, etc. It simply works very well. Not big enough? run two of them.
Bob's 715 probably would have run like poop as delivered to me.
Idle feed is massive, carb was hand made into a double pumper, the details of such are very fascinating to be honest. Someone tossed a newly minted baseplate on it, which aside from hanging the throttle open, it defeated the purpose of the original modifications.
I'll put it back to stock specs and it should run just fine as is.
of course I could be wrong.....