Not to revive a dead thread, but I'm about ready throw my Holley TA out and smash it with a sledge hammer. I've watched countless videos on the MSD Atomic EFI, just watched some videos on the EZ-EFI and now I've found this thread and read your review on this product. Out of these 3 systems, which one would you recommend? I want to upgrade my fuel capacity and have already planned on getting the WH Sherman 23 gallon tank so I can run a return fuel system. Also, I don't even see the Edelbrock EFI listed on the Wild Horses website anymore, just the MSD.