Duramaxin14

Hey guys I just bought me a new boat whole and I知 looking to do 5.3 build I知 looking to be around 700 hp on pump gas and some boost I have a couple questions. I知 not very good at the wording you use to be able to use the search engine the 5.3 I have was giving to me the engine ran hot lost oil pressure and has a knock to it now so I知 going to have to rebuild the engine can anyone point me in the right direction on how to build it for it to be a reliable build? I have a old 66mm turbo off my diesel that I was going to put on it and just set the waste gate so I don稚 over spool it what do you guys think?