What is the history of the truck and engine? Why was it rebuilt?
If it was using oil before, it will take some time to clean out the tail pipe. Get it out on the highway and run, coolant will also take a while to burn out.
Vent the valve cover,
change to new plugs,
check the oil real close,
drive it,
and recheck the oil and plugs.
Let us know after you do this.
Joe
