Motor mounts will have to removed and rewelded, different cooling system,different exhaust system ,data tag will need to be updated (Good luck explaining that one to komatsu) plumb the fuel system, the transmission won't last very long even if you are able to adapt the flywheel ,different wiring harness and key switch, different starter means different bellhousing mount. By the time you're done you will about 3 times the price of a new truck, but hey I do wish you luck with that.