I was going to do a swap for a customer in Ohio. It fell through but in doing the research it seemed an 05-07 Avalanche was the best candidate especially one with a 6.0l. I found a 07 donor dmax in Ohio for him but he just never got back to me. Looks great, good job hope you get it dialed in. Question though, why HP over EFILive?
The avalanche never came with the 6.0.......
And FWIW, the 05-06 and 07 avalanches are completely different trucks.