You buy me a master install kit and I'll give you my Motive 4.10's. I am planning to put my original 3.55s back in and I won't need these. You will still need gears for the front axle, though.
You should just swap axles lol, much easier!
Nice truck and decent times, baselines are great to look back on!. I'm sure your wheels are killing you, are they heavy? Gearing would definitely help, and proper tuning. I'd sure expect you to be running quicker either way, my 4.7L with just a canned tune and drop in and 3.55 runs faster than that with heavy tires (although I have light wheels). Keep posting on the progress!