43 is a high wing loading for a 69" plane. I had a plane with numbers very close to those- notice the word "had."

The plane will be flyable, but it will have a high stall speed. Take-offs and landings will not look scale, and you will have to maintain a higher-than-scale looking speed in flight. I don't know about your structure, but I didn't have any troubles with mine, as I built it strong (one of the reasons for the high weight). Anyway, you might shy away from high-G maneuvers.

I lost mine (a Pica Cessna 182) when my engine quit on approach and I couldn't make the runway, because I stalled at around 30 mph.