What about a Fox Eagle 74 for power?

I ask because my father has a Balsa USA 1/4 scale Cub that he has been working on and that is the engine he is using. The Cub is nearly done and needs only a couple more hours of finishing work before it is ready for its maiden flight (only took 13+ years to get there) I have my doubts about the Eagle 74 having enough power to fly anything beyond scale like and am concerned that at a critical moment the lack of power could spell disaster. I'm thinking a Saito 125 or 150 would be a better choice however, it is going to require some 'surgery' for sure to change over to a Saito power plant which would delay the Cub's completion even more[]

Anybody have or know of a BUSA (or equivalent) 1/4 scale Cub powered by a Fox Eagle 74?
I would like to hear about how well it performs. Thanks!

Mike