Mine runs inverted in my Fokker DVIII, no problems. I dont have the sizes right in front of me but I believe your setup will work. You can do a search for Fokker DVII and look for my nickname as the starter, I have the dimensions listed on that thread. I put this engine in my DVII, DVIII, 1/4 scale Bud Nosen Aeronca, and have flown a eight foot stick (home brew) with it. Have fun.

David