I've seen these mounts before and wouldn't use one. Goldberg and Tower both have mounts that are two separate pieces. They can be adjusted any way you want from side to side and up or down. They are long enough for four strokes. I usually drill and tap the mounts and then use a bolt that is long enough to install a nylon locknut. The length of the mount is determined by the engine, 4 or 2 stroke. Just cut off the part you don't need with a razor saw. A friend of mine lost an airplane because the engine shifted under the clamps used on the mount you show. If I can't drill a hole in the mount for the mounting screws, I don't want it.