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What engine? IO 540 C, K, G?

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Active Member
Sep 20, 2007
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I want an IO-540 with 260 to 320hp. and it should be able to convert for aerobatics...
but what engine can I take?

is the IO-540 G1B5 @ 290hp a good choice? or the IO-540 C4B5?
or an K model?
what are is the difference betwen the K and the G models? same case? same crank?

in which engines are the big Prop flange cranks?

thanks for your help !!!

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