I'm assuming these are Lycoming studs.
As I recall, the exhaust studs for small continental are coarse thread on one end (cylinder), and fine thread...
Re item 2, FWIW the txp in Martha's 180 was a model that incorporated ADS-B out.
Besides the actual flying under the bridge, having that unit turned...
This is kinda like repainting an airplane right before selling it.
What's bound to happen is the person who wants to buy it is gonna say "gee I wish...
Seems like a lot of big tires on skywagons are more for show than for go.
As long as you're operating on airstrips, and not mud bogs or gravel bars,...