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WAG Aero Cuby Engine Change from O-320 to C-85

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Just Fly

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Hi All...
Even though my airplane is EXPERIMENTAL and I can run the engine "on condition" the engine is at the magic number.
I'd like to know how difficult it would be to change out the O-320 for a C-85, and would it make it a more docile airplane to Take Off/Land and fly.
I have 2ea 12 Gal wing tanks, no header tank and its solo from the front-could I still fly from the front seat with the change in weight?
It seems like alot of power to handle...my instructor was having difficulties (only instructor for 400 kms) and training has stopped.
So I was wondering what the effects of changing the engine would be.
Thanks in advance.
 

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