I'm not too sure about how Nissans work, but if you tried to put a 72# injector on a mustang, you would have to use an external driver such as the PMS, EPEC, FEl-Pro, etc. I know MSD and a couple of other companies make high impedence injectors up to 50#'s, but anything over that and it goes to 2 Ohms. Do the Nissans work the same as a Mustang, or does anyone know of injectors higher than 50# that are still 12 Ohms?