The attached chart should help with some of your work.  Power changes for a given manifold pressure with altitude because the backpressure on the engine is changing.  So a complete set of tables is necessary.  I have the  Columbia Pilots Operating Handbook as a PDF and can copy some of the tables if you wish.  Let me know what altitude you are interested in. I have put in one table for 8000 feet below. 

 

I have extracted some max power climb fuel flows vs. altitude from the Columbia manifold and fuel flows for 50F lean of  peak operation and put them together on an Excel file, also attached.  I printed this and stuck it on my panel below my engine monitor since my memory is a sieve nowadays. 

 

Fred Moreno

 

PS the 2000 RPM limitation is an airframe limitation, not an engine limitation (something somewhere must vibrate a lot).