I took the plunge and bought the MSPNP2 and a wide band O2 sensor for my 5.0. I was pleased that it started on the first try after swapping the ECU and once I calibrated the sensors using Tuning Studio it idles. Next step is to install the wide band and calibrate it to get some more accurate AFR. Once I get the idle smoothed out and generally good running I am going to swap the distributor and TFI for EDIS. I've had all the EDIS components laying around for a year but couldn't install them without some kind of tuning chip or ECU change. The learning curve is not as steep as I thought it would be on the Tuning Studio software so I'm pleased with that.