Cessna Skymaster Fuel/performance computer
 

Hello ALL.
I'm looking for a fuel/performance "Wizz wheel" computer for a 1965 C337. I purchased this Skymaster and am studying for my initial training for the twin rating. As you probably know, the older POH/AFM are NOT very informative, as the newer Cessna are. So any help, ie, the computer may help me understand the Skymaster better.
Thanks, BILLS