Efi tunnel ram ????

If you are not racing period correct then I would go with EFI. I'm sure that you would be way better off. I would think the 2 companies you have stated has a 2-4 set up.
Another you can try is Fastman EFI.Rich Nedbal is his name.He set up a car I had that had 8 throttle bodies.72plymouth GTX-R ENG.JPG