That arm is a bull. Took me 2 weeks to get one off a 130. A small 2 arm puller will fit in there. Instead of drilling a small hole in the shaft to center the puller, use a small nut, or a couple washers to center up your puller. Cinch it up. Spray lots of PB Blaster. Don't be afraid to give a couple good whacks with a piece of stock. I also applied heat with a propane torch. Most likely rusted on the shaft. Be patient. It will come off. May take a few days of blaster, heat and coaxing. By the way, I found a broken woodruff key inside my steering box. Swapped it out and now the steering is good as new.