I have an engine crank but frankly, it would be a whole lot easier just to pull the plugs, put some oil in each cylinder, let it sit a few days and then just grab the harmonic balancer with both hands and see if it will turn that way.
Even if it is still free (i.e., not seized), you don't want to turn an engine that's been sitting a long time as there probably isn't much/any lubrication on the cylinder walls. Let the oil do its work and then give it a try.
Congrats on the truck, BTW!
