Sorry, I am just tired of people hacking the old 6.2 when they have no experience with them. I apologize for heaping you into that uninformed lot.
The magic of diesel fuel and turbochargers is that it's like firewood--just dump it in and power comes out.
I have a 7.3 in my 2000 van and it's weak. I know it has no intercooler, is de-tuned by Ford because it's tucked back in a van, but it's weak. I'm afraid to tow with it. Passing an Amish buggy is like getting an Olympic Gold for this thing. It does get excellent mileage though. Plus, it sounds cool.
My other experience with 7.3s is when I borrowed a 2003 crewcab dually from n9emz 3 different times to pick up stuff from the East Coast. That truck had a 6-speed and supposedly 275hp and 525ft#. Once I put my trailer on it, it was slow. My truck you stomp on the gas and it GOES. This thing was slow. I was in the hills in Penn and downshifting, which is unbelievable. Finally, i noticed that once you set the cruise the computer would give the engine the fuel. It was very strong with the cruise on and I didn't have to downshift. But accelerating with a loaded trailer was still a problem as you can't have the cruise on for that bit.
My bus/RV has the DTA360 with a 6-speed and though it's only rated at 185hp, I'd love to have a pickup with that motor in it. It feels a lot bigger than that.
I drove M813 6x6s with 240hp Cummins 14-liters in them pulling 155mm howitzers back in my youth. A 5.9-7.3 engine with a turbo would have been a huge improvement. I totally value horsepower.