It has an original m360 std rotation engine. I noticed water in engine from leaking exhaust manifolds. Bought new manifolds and risers as well as alternator. I have a new exhaust boot from previous owner and was told the Chrysler 300 sterndrive had maintenance done to it before i bought it. Never got it in the water because id fix something and not get back to finishing for a long time. Now committed to full overhaul. Gutted stringers and about to with transom as well due to rot and carpenter ants. Ive decided to just replace the engine with a rebuilt. The fact that the sterndrive may be ok but that it sat for about a decade I don't know if i want to put a new engine with rebuilt boat on an old sterndrive. Am I complicating things by thinking of changing thingsleading me to possibly needing new steering if incompatible, ect. Ive read in forums that a Volvo penta AQ might be an option. Before I work on the transom i figured i should get input on how best to go forward. Thanks