I love my efi conversion, I have put about 4000 miles on my car since march when I completed it and I dont know if I put that many on it in the 5 years prior I owned it. Not that it ran bad with a carb, it just always runs the same now. Bought a dakota with a 5.2 mag, used the pcm and wiring and in 3 months of weekends it was up. For performance I would still use the carb, but I dont think I would build another driver without efi.