I have a Piper Cub that was given to me. It has a 70 inch wing span. The fuselage is 40 inches from the firewall to the elevator.

What size plane is this? Is it a 1/5 or 1/6 scale or is it a 40 or 60 size. What engine should I put in it? I have fox eagle 60 would this work?

I can't identify who made the kit or plane. How would I set the CG on this?

Any help is apreciated!