What constitutes "heavily modified?"

[JeepHauler78]

Manual PCM is in, only thing left is lifting the ZF5 into it's final resting place.

From what I gather by your post, I would not take advantage of the full potential of the stage 1's and the intercooler without custom tunes?

I thought I saw somewhere you posted that the 120 and 140 setting were not available for the older body style 7.3's, am I correct?
I really only need econo, moderate, heavy, and very heavy tow...but a "race" setting would be fun. I'll probably forgo the "stock" setting since it's not my primary vehicleand get's driven maybe 7,000 miles a year...usually all at once.