Any prop which allows the engine to run between 8500 and 9000 will work, but depending on your flying style some will work better then others.
The 16x8 is a good size to start with.
You might give Richard Verano a call at our service dept., he may have a copy of the AC instructions that he can send you.
The number is 775-782-4562.

Glad you like the engine.

Good Flying,
Dave Shadel