That is a little too much considering you're at sea level. I fly mine on an OS .91 four stroke and that's more than enough up here at 5500 ft. elevation. However, if you are really careful about throttle management you will be ok. I say really careful because I had a friend of mine split a wing in half on that same plane coming out of a loop using an OS .75 two stroke. That's not to say there couldn't have been a flaw in the wing joiner but be a little careful. Just fly her like a Cub on floats and save the outside snap rolls for your favorite pattern plane

Enjoy your float Cub!