I decided to change engines to an OS 55 with a pitts style muffler and mount the engine sideways. Was starting to cut the new cowl to fit over the engine when it occurred to me that I won't be able to install the cowl because it won't slip over the cylinder and muffler pipes at the same time. I am too tired to think, so I took some pictures, hoping that somebody has done this already. I figure (in my less than awake state) that I can either cut the entire cowl bottom off (don't really want to do that) and slide it past the pipes. Or, I can remove the muffler mounting screws, cut the proper slot (or holes) in the cowl for the pipes, place the muffler in the cowl, slide the cowl/muffler into place, and then re-install the screws. This would mean that I would have the drill a hole in the top of the cowl to slide the screw through and install the muffler. I think the screw closest to the carb would be close enough that I could just make the carb opening big enough to install the screw. Does this sound about right, or am I just too tired.