Well I guess I'll start this thread off with my adventure. Progress has been slow as I have too many irons in the fire, but this is where I'm at now. I have my SUBURBAN with the engine, trans, and transfer case pulled out. I also got my 01 donor's powertrain pulled out. Here's my donor after I drove her into the shop. The radiator and intercooler were trashed from it's wreck, but you'd be surprised at how well a heater core can cool an engine. This was after the first afternoon of about 2 1/2 hours with my nephew helping me. He's trying to learn more about cars than what his playstation has taught him. Took all of the harness's out without cutting. On the second afternoon it was just me, so I was able to work without teaching. Took about 3 hours to have her out and the donor rolled out. It wasn't actually as bad as I thought it would be to pull the engine and tranny out together. It's one HEAVY SOB, but came out fairly easily. The worst part was realizing while the engine was hanging on the hoist that the front diff had to drop down an inch to slide the engine out in order to clear the oil pan. I'm still up in the air as to wether or not to transfer the cluster and BCM over. The only things I see that I will lose that really matter is the tranny temp guage and the tow/haul switch. I already have an older QUADZILLA digital guage for the tranny, and BRAYDEN at FLEECE can write me a custom TCM OS that will allow me to use tow/haul without the BCM. The WIF light can simply be tapped into the sensors output as it is just a magnetic on off switch that grounds a circuit. The wait to start light and check engine light already have there own drivers coming out of the ECM, so they can be wired directly to my existing cluster. The 01 ECM appears to have the correct ABS seperate output and a speedo output, so I should be able to elimnate my VSSB. I'm sure I'll run into many obstacles along the way, but so far it hasn't been that bad. The ALLISON measures just 1" longer than my 4L80E, and the LB7 block has dual bolt patterns that will accept my old engine mounts. I'm going to do a test fit in the next few days to see if the mounts line up or not in the SUBURBAN, but if my measurements are correct the DMAX is actually not as long as the 6.5 I pulled out. And the fact that they moved #1 over to the passenger side on the DMAX should allow ample room for the downpipe to fit in. It also turns out that there is a converted 99 C2500 SUBURBAN in VALRICO that has a 01 DURAMAX ALLISON in it. His is a 2 wheel drive, but he said it was a pretty easy swap. His was a 6.5 to start with as well, VS the one the dieselpage did where they started with a 88 1500 gasser. I'm probably being overly optimistic, but I don't want to burn myself out early on in this big of a project. And here is the recipient just before the 6.5 was pulled.