Scott- did you post your 4-link build on pirate under the name Scottapher?
We're much more friendly here than Pirate...
that much white smoke in your crankcase would make me think piston rings. can you take video of it for us?
if you have the tools, i'd perform a leak down check. if you don't, pull the intake and look for any "sanding" on the fins of the turbo. that would be an indicator of dirt making it's way into the engine. the stock airboxes have been known to leak some...
As for chips, we all have our favorites, but there are a few well known and respected tuners.
Power hungry performance- Bill and corey are great folks, sold me a tuning package. obviously my favorite
Tony Wildman (Don't know if he's tuning right now, long story short his daughter is sick)
Matt @ Gearhead automotive
I'm sure there's a few others, i'd just check the site sponsors section.
With tuning, you may get the occasional check engine light from low oil pressure, this is pretty common on a tuned and otherwise stock truck. the rest should keep up, but you are putting more wear on the truck in general.
gauge is rather important IMO
especially if you're towing.
I would also retrofit an intercooler from a newer 7.3L or 6.0L. there are plenty of articles on that here.