post up some info on the truck and what area of the engine it is coming from.
its possible if it is a 12v that you got attacked by the KDP and broke your timing cover, could be a hole in an oil feed line, or a loose fitting on a line, possible that the tappet cover gasket has dried up and leaking out the side of your engine.
post up some more info about the truck and location of the leak and you will probably get a better response:Cheer: