Right off the top of me head I can think of the rear axle. The quara-track case has an offset rear output while the Dana 18,20 and 300 all have centered outputs. I have seen one person run the centered t-case with an offset axle, but there was no lift and they spent some serious money on a good shaft. Still I see problems down the road if you actually plan on wheeling it.
Check this site for info on the differences between the cases, from there you should be able to get an idea of what you need.
Here is about everything you need to actually mate the tranny to the t-case.
What part of Washington are you in by the way?