Unless the 2.1 is much heavier it should be fine,the Soucy is a 77 inch aircraft,may have to move some stuff back if possible.
A 2.1 is quite a motor,I would switch to gasoline at this point.But if you buy gas then you may as well skip all the small ones and get a 50+cc,but then you need to buy a bigger airframe and probably better servos and batteries
Put it on your Christmas wishlist