Dan, If you are based at a 6,000' airport, it's a nice improvement to get either the O-200 crankshaft conversion STC (which improves climb to be, so they say, near the C-90) OR get an actual O-200 put in the plane.
Or habitually fly solo. Also, I'd be sure to have the prop pitched to be a climb or extreme-climb prop if I were based at that high an airport. Runways are long at high altitude airports so getting off seems not to be the main problem. It's climb after getting off the ground that's the limiting safety factor, I think. Ed
