The site sucks because you didn't get input in a little over 24 hours? That's a little harsh from a newbie. Might I remind you yesterday was Valentine's Day and I for one, was spending time with my sweetie and not on-line here, as much as I do like to be on-line here. And with the volume of posts that come in here, it is possible for some to slip away without being seen. Sorry, but that's just the nature of the being.
As to your question - Most of what you need to do is standard maintenance. Keep up with fluid and filter changes, tire rotations, checking belts/hoses/brake pads periodically, check for leaks ever now and again so you can address them to keep the truck "super clean". The 7.3L is a very reliable power plant and will last a long time, if they are taken care of.
Oh, BTW - Congrats on the truck - Post some pics sometime, we don't tired of seeing trucks!