finally figured out the carb mounting- made an aluminum block to slide on the cylinder nipple and held in place with 2 set screws. The mount appears easy as well as the prop hub. When I removed the flywheel, it is a small finned aluminum ring with a metal plate under it that has a 3 bolt pattern. I can now make a prop hub similar to the ones used on Quadra engines and bolt it directly to the steel plate. In this way the original bolt stays in place to hold the flywheel assy on and I believe I can still use the original electronic ignition without havint to add the C&H after all.
As time permits, I will post a couple of photos since I saw several other threads concerning the carb mount.