Ok as best I can guess the spiral pin is on the creeper shift arm. But where? I looked up the diagram on the link you posted but the pin is not numbered or shown. The creeper shifts forward and back and I see movement through to the clip that holds it in hi or lo. So this pin is somewhere from the knob to through the housing to the other side? I'd check if I am sure I am looking in the right spot.
I really am glad for the help guys just frustrated I have had so much go wrong this year with this old girl. It's been a great little tractor as long as I have had it. I guess the statement "nothing ever goes right with a tractor sitting" pretty much sums it up for me this year. No snow to use it for the first time in 50 years in CNY and she sat. Guess after this there isn't much left to repair. If I get into doing a split I guess I'll have to start another post on a resto, fast and dirty but a resto of sorts. Oh well I guess I'm in it this far might as well see where this takes me.