Today I finished up the latch for the receiver pin. Of course I needed something simple to operate, but simple to build so very little could go wrong with it. I thought the best solution was to make use of the offset between the two pieces of 5/8" rod... it works good enough to limit the throw, why not use the same concept? Below are the pieces for this unit. The rod is 1/4" with a half-washer welded to the side. The nut in the middle was actually drilled out and slid onto the rod, then welded in place as a stopper. After I finished, I threaded the left end of the rod with a 1/4-20 thread to screw on a black plastic knob. The angle-iron has a 1/4" hole in one side, and a threaded hole in the other side. The spring was just one I had in a bin that happened to be a perfect fit.
I used the angle grinder to cut a slot in the half-pipe, and the rod/washer assembly slides across this slot. As shown, the spring pushes the washer to block the slot, and prevent the hitch pin from sliding out of the receiver. There is a hole drilled through the front of the bumper which the rod slides through, and you can see how the welded nut stops the rod from sliding out too far. On the top side, the angle-iron supports the end of the rod. By unscrewing the angle-iron, the rest of the assembly can be removed.
With the bumper back on the truck, you can see the black knob just below the license plate. It doesn't take much force to push it in, and only slides about 3/4 inch. You do need both hands free to unlatch the pin, but once the pin is pulled back, you can let go of everything and slide in the tool you need in the receiver. Sitting at a 45-degree angle you can see my makeshift handle. I just tapped another 1/4-20 hole through the end of the rod and stuck a bolt in it until I finish the bottom bevels and can see where my clearance is at. For now, you just push in the knob, slide back the pin, and insert a hitch. When you slide the pin back through the hitch, the spring on the latch pops it back in the locked position. Once everything is painted, I can grease up the slides to prevent rust and makes everything slide real smooth...
So that's about it for the mechanical bits. I still need to weld in plates to prevent the receiver from rotating up&down, but otherwise the receiver is completely functional now. Tomorrow I can get started cutting out the fog light holes, which will be all kinds of fun (the only tools I have for this are the angle grinder and files). Fabricating the cans for the fog lights should be fairly easy after all this!