Check out the info in the tech forums,,,

2003 - 2007 6.0L Power Stroke Diesel:
https://www.ford-trucks.com/forums/forum107/

1999 - 2003 7.3L Power Stroke Diesel:
https://www.ford-trucks.com/forums/forum31/

The 7.3 and 6.0 are completely different motors. Each has its own advantages and disadvantages.

You probably can post your questions in both of those forums to find the info you seek.