If it is the Seagull version, and unless they have relocated the fuel tank, it sits about 3/8 to 1/2 inch above the needle on an inverted engine. It's not difficult to relocate. If you don't want to get into lowering the tank, use a Perry Pump and you don't have to worry about engine flooding.I also think your going to be a little underpowered with a 40. I flew mine with an Irvine 53 without any problems at all.

Sooner or later, we all discover that, "Experience is a hard teacher. She always gives the test first, and the lesson some time later!"

Phillip