That is the game plan, I changed the oil to rotella today, it had carquest 10w30 in it, I think it needs the rear main seal replaced from the amount of oil that is dripping from the clutch pan cover, I might pull the pan tomorrow and look at it. I am returning any non-functioning component back to service using the most correct parts I can find- In the future I think some wiring work is in order- mainly for the tail light. It likes to alternate between working and not working. Tomorrow I plan to change out the ranco heater valve, the gear oil in the trans and rear diff, possibly investigate the rear main seal, as well replace the heater core and radiator hoses. For the hoses I am going with the bellowed looking original type- I plan to reuse the heavy screw clamps that were on both the 3600 and this 3100, the originals on the 3600 I did not reuse at first, but they are so rugged that they had to go back on. This truck just drives so smoothly, and is such a pleasure to drive. The 3600 is not bad, but it is so interactive that you cannot relax enough to enjoy the ride(Which just means more work to do on it until it gets to that point.)
I Think this truck is the embodiment of my fond truck memories that created my desire to own them.
Now ask me to repeat that after I replace the rear main seal. Might be a different story.