Thanks for the help guys.

I think I'm going to get a OS LA 40 and just have some fun with this plane. Was looking at the OS 32 but, whew... pricey little engine--(that's why I was asking about the 4c, because, by the time I get the OS 32 with a pipe ,I could have bought a nice 4c engine). I think for just messing around, the LA 40 with a tuned pipe will do.
What do you guys think??

Thanks