Efi tunnel ram ????
I don't see any reason why an EFI system wouldn't be great on a tunnel ram. Remember the adjustments made by the EFI setup are based on the O2 sensor in the exhaust. Yes, you program what you want to happen but the adjustments come from the readings of the O2 sensor. If you want to make adjustments it is very easy with EFI as well. No taking a carb apart and experimenting with jets. I don't have a tunnel ram but I do have a 6-71 blower. I have a FiTech system and since I built my engine the EFI was the best dollars spent as far as upgrades. I think member "Famous Bob" has a sniper setup and he is happy with it as far as I know. Maybe he will chime in.
Jack