I found some very interesting Youtube videos relate to EFI and carbs v. EFI. I tried to post the links but it appears that did not work. If you do a simple video search you should find them easy enough.

One thing that was very interesting is that they couldn't get their EFI to work well with a dual plane intake but it was flawless with a single plane. No doubt there are many variables.

Another video shoe significant advantages in ease of tuning and hp gains using EFI.