I mounted my O.S. 91 FX in side mounting. I trimmed the leadind edge of the right wing a bit to fit the cylinder head. I did not move the engine mount. If you do, the CG will be way off. I had to put a few ounces of lead in the trailing edge to get the CG correct. My DV had many hundreds of flights and was a wonderful plane. I hope you enjoy it.

www.cardiacengineering/radiocontrol has a few pictures.