Let me put it this way, If I had unlimited money, I would not use a carb.
Anyone who says that a carb can create more power is wrong.
It is true You can get more power for much much less if money is the issue.
Spending 500$ on a carb setup on a stock 302, You would need to spend over 1000 to get the same HP from a efi setup.
But EFI is a more efficent and has more potential than carbing.
It just costs way more. Not to mention that streetabilty with EFI will be better, Considering it auto adjusts to climate/altitude/etc..
For example. Go take your tuned carb setup and drive way above sea level or way below it (depending on where you are) And your power will go through the floor.
EFI runs basically the same wherever it is.
Its just about what you want.
Carb has a cleaner look, No wires, etc.
For my uses of being soley a weekend/cruising car, Carb was the obvious choice, Since I wont be travelling in the veichle, nor will I be haunted by the cost of EFI performance parts.
Weigh it out. You should pick what means more to you.