I had a 6.0 excursion that was bulletproofed for nearly 7 years. I also have an f350 with a 7.3. Save time money and heart ache and buy a 7.3
It will cost you 8-10k to properly bulletproof a 6.0 and you will still have issues.
Issues.
-Head bolts. Too thin and too few. Arp sells upgraded...