I`d get a bigger carb and get it properly tuned/modified.......WAY cheaper and more dependable when set up correctly.......
Cheaper? Yes. More dependable? I doubt it.
I think I would use the holley terminator if I were going to go with a TBI/EFI deal in place of the carb, because it can be manually tuned later if you feel the need to.
If you have the wiring/electrical knowledge/cash, I still think you're best served by a multi-port setup with a standalone. Something like MS3 or a holley dominator efi.
I'm running multi-port efi with the MS3 Pro. Once you get it set up, do a bit of tuning, it's amazing. The car runs amazingly smooth.