Since you have this all apart and out of the truck, consider pulling the camshaft and installing an aluminum cam gear. Melling makes one and they're not expensive. The fiber ones are for passenger car use and are quieter BUT when put to truck duty, as in a 3800, eventually the fiber gear will shed teeth and the cam will stop turning. Aside from having to get towed off the road, the crank counter weights will hit some cam lobes and you will be out a camshaft. I speak from experience as this happened to me with a completely rebuilt 235 using a fiber gear. The engine had about 20,000 miles on it when this happened. 100 miles from home, I had a load of furniture on and it was most inconvenient.
