thanks for the info, i may look into that.
I think I'm going to ditch the idea of a tuner for now and try some other modifications for now.
I'm not sure what tuner has been used on my truck by the previous owner, but seein as how the truck came from Florida and i'm up in Canada, i don't think i'll be able to find out. I have driven some other 7.3's and a couple 6.0's and mine seems to be the strongest one i have driven out of them all. But i'm like everyone else, i always want more!