Ditto on all the above-Pictures show a 4*60 with side mount and Fiberglass specialties cowl using a OS91 which will be the same as the Magnum.
Side mount really helps in consistant running of the engine, and this setup works good, cools great and don't look to bad with the size of cowl they offer, but if I was to do it again I would invert the engine-Only because I've had experience with this plane and building.