I did the IDM on my 96 PSD myself and it really woke the truck up. Better respopnse down low and it rev'd out faster and farther on the top end. Of course it is only chipped with stock injectors for now. I dyno'd it with a 6 HP increase over the stock IDM but that dyno did not measure TQ on a 7.3L. I had talked to Jody about it and he said he was going to do some testing with stock and modded IDM's. I wonder if he has done that yet?