Follow the block heater cord back to where it goes into the split loom with the battery cables, etc. There's a gray retaining clip attached to the fender well that you can release, and then pull the block heater cord out of the split loom (downward, toward the frame rail). This will give you more than enough cord length to reach the grille or tow hook or whatever you want. Just be sure to route it away from anything that gets real hot and secure any extra length of cord with a zip tie.
ON EDIT: It probably doesn't matter for you being in KY, but the retaining clip comes apart easier if it's warm. I did mine when it was freeze-balls cold and it took all the patience I had not to break that thing.