Just a quick note: working on the 7.3l V8 in a bus frame is miles different then working on one inside the cramped quarters of a pickup truck. I have an International with the T444E (7.3l Powerstroke with International's "trim") and with it being a dog nose I can practically walk around the engine, or sometimes even sit on top of it
Just so long as you don't have to mess around with the up-pipes going to the turbo which are right behind the engine you'll be fine. Those are a real pain. It's no match for the dt466 or the Cummin's 8.3l, of course, but in my half-bus it runs like a top and with the 5-speed manual transmission it pushes up and down the hills at highway speed without an issue.