engine for world models cub
that engine should be fine in that cub. The wing generates a lot of lift. Cubs are not known for speed. And if you are intersted in flying it in a scale like manner then you will be flying off the wing and not the engine...
Enjoy your cub I have two modeltech with an fp-25 in it and a hanger 9 with an OS .91 in it (I know not scale but I needed to break in the engine and I liked being able to take off in five feet so much I just left it in)