Mission Creep on a D-150
Time for an update, I have about 600 miles on the truck so far, it continues to run well. I got the electric brakes hooked up, and added air bags to the rear springs. The truck rides so smooth and comfortable, I didn't want to add helper springs for load carrying capacity because that would like make the ride more harsh. The air bags are perfect. I leave them barely inflated until I need them, then pump them up when pulling the trailer. It was a lot of work to get them installed but it was worth it. Whoever wrote the install instructions was delirious - it said about two hours was needed but in reality it was two days of custom fitting everything.
Due to sheer dumb luck, I think it is finally tuned properly. It took a LOT of fiddling with the timing and carb but it magically fell together. I pulls as hard as I figured it would, especially considering this is a little motor pushing around a fairly heavy truck.