So I have ~550 hours on my engine (1998 mercruiser 350 MPI) I am hoping to get another 1000+ hours out of it. That being said, if for some reason it dies, what is the best way to get more power out of it on the rebuild/replacement? Not looking to swap out for a completely new motor; rather, looking for things like new heads, increase the bore, etc. Don't want a supercharger. Just looking to boost performance without sacrificing reliability, 87 octane gas or the pain/hassle of a new engine type.