I measured a YJ hinge this morning; YJ hinges will bolt to either YJ or TJ tailgates. The body side of the YJ hinge ends about 4" beyond the edge of the tailgate. A YJ ot TJ tailgate being 36", and the bottom of an M416 tub being 42" wide, YJ hinges stick out too far for them to be used on a YJ or TJ tailgate centered on the 42" bottom of the tub, they'll stick out about 1" beyond the edge of the tub. An angle bracket bolted to the side of the tub could possibly be used to install a lower YJ hinge, something to consider.