The next chassis project I tackled was extending the truck frame and making it a suburban frame. I picked up a pair of rear frame horns from a board member. I spliced em in, filled in the oval truck body mount holes, re-holed sawed a round suburban position #6 body mount hole, and then added about 8 inches of plate to box the frame in that area and add strength.
I also bought a Valley Industries hitch for a "67-72 Carryall" and bolted it up. I really like the way this hitch bolted up, although I had to make a modification to it to make it work the way I wanted. I bolted the two side brackets thru some of the existing rivet holes. In doing so the brackets were about 1/2" away from tow bar on each side. I just made pair of 1/2" spacer plates, drilled 4 holes in em and slid them in and bolted everything up. I think it turned out nice.