Welcome to the world of RC and RCU. As for an engine mount there are a variety of them on the market. It will come down to what will fit on your firewall. Great Planes makes an adjustable mount and there are other makers that make mounts designed for your engine. Depending on what plane you have, some kit makers used wooded beams for engine mounts. As for the rest of your questions, ask away, the members of RCU are a sharp bunch and are always ready to help a fellow modeler. God Luck, Dave