Hy Clutchheadstew, my book only goes back to 1938 one pin is listed for 38-40 p/n 1777442 for everything except 1/2 tons, that one will not cross into the Napa numbers, the other one is p/n 3656669 = Napa NCP2748126 $16.29, pin dimensions are 7/8" X 4 5/16", one other Napa number showed up when I crossed 3656669, NCP2744655, but it had no price, hope that helps.
