Do you have a friend with experience with these larger engines? if so, get help now! if not........go to the Great Planes website and read the "tech warning" on gas engines and cabane strut BEFORE flying this plane. Several factors will come into play for your success. While balancing your prop be sure to dull it down, sharp edges!......this size engine will cut off more than a finger!
You'll need a tachometer to check engine rpm while running in the engine prior to flight. Simply "thinking" it is pushing enough wind will not work with these larger engines and heavier planes. My main concern when anyone moves into larger planes is the torque these large props/engines produce. Dogging the small planes around is easy........do it with a gasser and someone could be wearing it! example: coming in for a landing approach at low idle and decide to go around for a better line-up on the runway. the plane is at a low airspeed and low throttle then the pilot suddenly sticks full throttle! the plane WILL torque out of control and someone could get killed. also, how practiced are you at using the rudder? it is a major part of flying big birds safely. have fun and be safe!