South or Central America, then? There are few places left in north America that use piston ag aircraft, whether pawnees, braves, callairs, etc. Some use of piston agcats, some piston dromaders, but not a lot of horizontally opposed piston aircraft in use.

Before addressing ag flying in the Brave or other aircraft, what about your background? Have you flown agricultural aircraft or done ag flying before? A discussion about the specific aircraft will have to presuppose that you have an understanding of working the aircraft in the ag environment.