Questions about editing aircraft...

Hello all.
I've been messing around with the config files for the default Cessna 172 and have been trying to downgrade it to a 172K (150hp Lycoming O-320-E2D, lighter aircraft, etc) and my questions are this:
1. Do all fixed pitch propeller aircraft have basically the same pitch angle to the propeller?
2. Is it possible to go past the limiting RPM rating for the engine in level flight in a real aircraft?
So many other questions, so little space and time.
Thanks.
I've been messing around with the config files for the default Cessna 172 and have been trying to downgrade it to a 172K (150hp Lycoming O-320-E2D, lighter aircraft, etc) and my questions are this:
1. Do all fixed pitch propeller aircraft have basically the same pitch angle to the propeller?
2. Is it possible to go past the limiting RPM rating for the engine in level flight in a real aircraft?
So many other questions, so little space and time.
Thanks.