hi there -- I have done a search on various discussions and read a lot about overhaulting to the 160. I'm having an overhaul done on my PA-18-150, and am wondering if any of you can simply name a resource or two that my mechanic can consult about getting the STC and exactly what happens. He's concerned about doing the right thing, and said I could save some money on his time by asking you folks about it. I appreciate his attitude and would love some advice. Thanks!