I feel dumb for asking this but what is that shaft on the engine to the right of the crank??? How have I never seen one like that before?
Also, Once you set the governor you can just use a spring to hold it in place at its peak rpm setting (UP), I tried a pulse jet on my 5hp and it just didn't have enough flow for a 5hp, cutting the sliver off the bottom of the TC plate only took like 5 minutes and it fit great, I'm sure it has no effect whatsoever structurally speaking. I'll take some pics of my set up tonight.