bcrc,
Although a great aircraft, I have a Jack Strickland Stearman and the nose ring and firewall area is way to small for the MOKI 150. I tried this out, but the over hang of the MOKI is too great.
I will add, if someone has a small twin like a FUJI 86, Z-GT80, or even a large single like a Brison 5.8 they work great. I know of owners of this aircraft that run these engines on their Jack Strickland Stearmans fly great. I flew one years ago with a Brison 3.2/50 cc gas and it flew very scale. I am putting a 3W-70 on mine now.