Well, a whole lot changed once I discovered Torfab's 80 Series Gen V LT Kit. I cant speak highly enough of him. He answered tons of questions and was so fast to respond. So I made a pivot and switched the plan to a 6.2 LT and 10L80. His kit offers 100% bolt in application. You start with a 6.2 or 5.3 with a 4x4 10L80 or 8L90 and use his adapter to mate it with the LC80 Transfercase. You are able to utilize the factory oil pan and truck style manifolds. His kit also places the transfercase where the factory driveshafts can be used. Tor is also building me custom fan shroud and mounting kit which will house factory style PWM fans that will be controlled by the Gen V ECM. I know Ill have great support once I begin the install.
I also ordered a factory Harness rework, Gen V DBW pedal, ECM Tuning and his "Muscle Car Module" from SwapTime. Mitch over there is a wiz with these things. He specializes in C10 truck conversions but he seems very interested in breaking into the LC world with these LT conversions.
The rest of the swap is very similar to doing an LS. Ill post more once the build commences.
I'll also continue to update the 1st post with build/part info