I don't know if you've started this or not or called yet or not, but I called over and talked to Eric Swanson personally (I was actually surprised that he answered the phone himself two of the times I called), and he is more than willing to answer any questions you may have. He will answer your questions in detail and make sure you understand before the conversation is over. I thought my questions were silly, but he goes on the adage that the only silly question is the one you don't ask and mess things up.
I also watch the channel DEBOSS GARAGE, and he did a diesel swap into is Yukon/Tahoe. He's another one that always always will answer your questions as best as he can without hesitation.
Good luck on your swap. I plan on just dropping mine off do Duraburb after researching all that goes into this swap. I have a 2007 Suburban 2WD LTZ, and I'll be going with an LMM with the AutoTrac 4WD that they install on their trucks. The LML seems nice and all, but I really don't need more than that for my family vehicle. I'm upgrading it to be able to take my whole family (wife and I +4 full time kids +1 that comes on occasion) on vacation and tow the trailer much easier.
To each their own.