Towing with a Powerstroke 7.3L (expectation/realistic)

I saw a big block gasser dropped into a Pinto. It twisted the frame so bad that the rear window blew out and the doors popped open. The guy did again but welded a parallel sub frame to keep it straight...

I have to agree that if you you are looking for reliability or using the truck to make money to pay your bills, it is hard to justify tweaking the engine beyond original parameters. On the other hand, there are some upgrades that increase reliability by addressing weak points in the OEM setup.