Most of us can only fly a 24-30 inch span plane 300 feet or so before needing to turn back, so flying at 150 mph just means that you do it more often. If the plane is set up conservatively, it's a piece of cake.
The most difficult detail is conserving enough space under the pipe to fit a fuel tank. Ideally, the front silhouette of the fuselage is limited to just the engine's outline and the pipe is totally enclosed. High wingers hand launch the best, so an inverted engine seems to make sense then. 1/4" thick, solid balsa wing with inlaid full depth evergreen spars...you could throw something together for that engine pretty easily. The shrunken plastic bottle cowl method is quick and easy to do. I think you would enjoy trying it, just have a good pair of ear muffs [and foam ear plugs at the same time].
I used to use HS-55s and those really cheesy GWS RXs in my speedster and never crashed it [what a foolish idiot though].........