The wife brought me home a little something for the F250 for Christmas. I'm starting to get in the Holiday mood (this is an aftermarket part right!? :) )
I had one on my jeep and thought about one for the 6.7. Like you said, run it out and put the end around a tree or something. You can spray it or use some grease and work it into the cable. Check it often in the winter and you will be ok.
Sorry about that. I had a heck of a time finding that new part so posted the link.
To the OP, H&S has a new kit that is easier and cheaper (around $37) and it just involves 2 plates. It's nice and an easy install.