ADH, the letters designate, model A, diesel, hillside option which means it is a wider gauge track. Most parts will interchange with an A model, such as your sheet metal, or track rollers. Depending on where you live, it might be easier to look for someone parting out an AG6, the parts you asked about will work. I think you gave your engine serial #. Look on the front of the firewall, right behind the engine, up near the top, probably on the left side, and possibly on the right. You will be looking for a tag about 3&amp;quot;x3&amp;quot;. It might be hard to see if there is much dirt or grease, so take a rag and can of carb cleaner with you. for all years except 1953 and 1954 you will be looking for a number followed by the letter Z and 2 or 3 more numbers, such as 3Z789(example) for the year 1953 it is 3500000 up and 1954 it is 4500000 up.
Later, Andy