One of the most important things for any ignition is to keep it cool so it will live longer. The MSD can be mounted most anywhere in the engine compartment as long as its not near the exhaust. Perhaps the best option is to hang it on the radiator support to ensure lots of airflow, and we're not opposed to rattle-canning an ignition black for stealth. The MSD is fully potted, so it can resist water. With the Digital-6 Plus, mounting with the adjusting switches accessible is a concern.