I experimented years ago with a buddy's Eagle 63 years ago with a wing swap. I put a small (400 sq in) wing on it. Most trainers have a bunch of decalage built in, with positive incidence on the wing and loads of down thrust. Since I didn't reduce the down thrust, I needed to maintain the postive incidence on the wing.

Another experiment on another trainer (also an Eagle), we removed the covering from the bottom of the wing and grafted on ribs to the existing ribs to make a semi-symetrical wing.
This flew pretty well, with the original incidence. Flew much better inverted.

I'd put the wing about 1 degee positive to the tail, and decrease the down thrust to about 1 degree. Fly and adjust the down thrust based on flight test.