trying to mount Irvine 53 on U CAN DO 46 i think i must be missing something if i mount it upright the gas tank is about 1&1/2"low if i invert it its about 1&1/2 high i cant side mount muffler wont fit the best i can get is mount inverted engine upright gas tank is still 1" low it says mount engine so back plate of spinner is 5" from firewall good luck any ideas i know the plane has a 4 cycle in mind but some of us have 2 strokes SOMEBODY HELP