I've hauled some heavy weight a couple of times in my '84. A fair number of years ago, I hauled a 1000lb table from a milling machine, and a couple years ago was a 1000lb bag of gravel. Power was no problem, but keep an eye on your braking distances. Recommended corner speeds are also a good idea, both for unexpected surprises around the bend and for a potentially unstable load. With the bag of gravel, we had no way to unload it except to chain the pallet under it to a tree and drive the truck out from under it; with a little care, those tailgate cables should be plenty stout to handle loading the saw up.