I'm in Minneapolis, MN
As noted in my other corrections, it is a '69 3-cyl GAS engine.
Today, I attempted to measure the distance from the mounting face to the ring gear and compare it to the starter motor throw. Bad light, flash light dead, trouble light burnt out and too many other things to take care of.
This tractor is a 5-speed manual transmission with high/low.
Did notice that the ground cable runs to the 1/4" bolt that holds the solenoid to its bracket. Going to get new cables and attach the ground to one of the starter motor bolts. Also getting a new solenoid.
My wife manages a boarding stable and I get out after work and on weekends to try keep things fixed. Always interesting.