One thing, though. The 150's O-200 is more susceptible to carb
icing. It's not really a huge safety issue if you know what to expect
and take corrective action. After 50 hrs. or so it becomes second
nature to hit the carb heat at the first hint of roughness. Problem
solved.

This is, of course, a theoretical discussion.

Exactly. My 150 carries my 220 lb person just fine, and a smaller
person without a problem. Even in clouds or heavy haze, I've never
encountered carb ice. I still check for it, but it's not there on
this engine. Some of the Connies in the 150 tend to be ice-makers,
but apparently not mine (so far).

We chose a '67 G model because that's the first year they bowed the
doors out and gave you and inch or two extra elbow room.

Good luck.

Greg