Just for you Jim, I went out and took A couple of photos. First photo is A 1.20 III pumper. The rocker arm cover is the old type, I had to replace it, the cover next to it is the newer type, I had to cut slots in the screw heads to remove it and I had to hit it with A cutting wheel. The next shot is the newer pumper on the right and an old one on the left. NBotice the difference in the pumps, the newer pump and regulator are black plastic and the old pump is metal. If someone offers you A deal on one like on the left just smile and say no thank you, you can't get parts for the pump, I use it for parts, that's where I got the rocker cover. Just for grins I set an OS .91 next to the 1.20, just A slight difference in size.