Til,

I guess the most difficult parts of installing the ZDZ 40 into the GP Super Stearman:
* mounting the engine (I built a 1/32 ply box countersunk into the FW for the rear-induction carb)
* setting up controls for throttle and choke (had to make new new control arms for both throttle and choke shafts, mount a bellcrank at just the right angle for the throttle, and use a flexible pushrod for the manual choke)
* making a custom Pitts-style muffler that would fit between the engine head and FW.

These were not necessarily difficult, just tedious.

If I had it to do all over again I would use a big four-stroke nitro and save the ZDZ for a plane intended to use it!

Let me know if you decide to do it.

The Duper