I called Precision Airmotive this morning, and they have a shorter offset mixture arm (1 5/8″ vs. 2″) that should work perfectly for me. This should eliminate the interference with the starter and allow me to hit both stops on the mixture arm. With the longer lever, I could hit one stop or the other, but not both due to the short throw of the control cables.
I also called around for a bit trying to find an AN932-5 plug, but couldn’t find anybody who stocked them. I ended up ordering an AN932-5D plug instead which will work fine.
I spent most of the night cleaning up the garage, but I did swap out the rocker arm cover gaskets. You can see the old cork gasket on the left and the new silicone gasket on the right. Surprisingly, I already found an oil leak from the old cork gasket, so I’m glad I replaced these.