Yea that would be my best uneducated guess. Who ever did it definitely got creative. I hope it was a lot of work as a joke but I am sure someone drove that on the street.
With the big winch and cut off mounts that look like they were for an aframe or rear boom, this.thing was.either a towtruck, or way more likely, a log.skidder for the woods. Just my thought. But, can anyone confirm w certainty its an fj55?