http://adds.aviationweather.gov/metars/

Climb at Full throttle and Max pitch at 1400fpm and 110KIAS 

Reducing to 1300fpm at 5000ft 

Reducing to 1200fpm at 10000ft 

Reducing to 1100fpm at 13000ft 

Reducing to 1000fpm at 15000ft 

Reducing to 900fpm at 17000ft 

MP will start to reduce at 19700ft 

Throughout the climb lean the mixture gradually to maintain the Maximum reading on the EGT gauge. 

Still Air Distance to 21,000 ft is 39 nms. 

When leveling off, allow the speed to build to about 120 kts then throttle back to 24" Manifold Pressure and Adjust the pitch to give 2400 R.P.M. Lean the mixture to give a maximum reading on the EGT gauge and this will give about 14.5 gallons per hour at 21,000 ft.

 Cruise 21000 ft or 20000 ft 24MP 2400RPM 114KIAS 158TAS 14.5GPH Absolute still air Range 847nms Descend at 15MP 2500RPM and 2000fpm Dist from 21000ft to 1000ft is 28.5nms using 7GPH