Depending on how you do it, it generally doesn't increase pull strength. But I do a similar setup all the time. My X has two tow hooks in the front and two in the rear so I can cross-tie the frame. I hook a 6 foot 30,000 lb tree strap to the hooks and loop the strap through the tree strap. This allows an even pull on the frame, which makes pulling easier on my X. You just have to be willing to go to the effort to put the hooks on the rear. It required some imagination and work, but they are very effective now that they are on.

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Gordon "The Warmonger" White