Is it possible to take a 6.6 Duramax out of a Chevy or GMC and drop in a 7.3 Powerstroke? If so how hard would it be.

 

I would think it is for sure a possibility but if I may ask why would you? Are you just a fan of 7.3's or is there a common issue with the 6.6? I ask because I am currently trying to convince a friend/coworker to let me swap his 80 something blazer with a 6.5 currently to a 6.6 Duramax