I have a carrerra 20.5 open bow jet boat that im putting a 7.4 merc cruiser mpi with a wipple super charger . My question is my old 454 didn't have a water pump on it and this new motor does, do I need to keep the water pump on it and if I do need it will the 5/8 feed hose from the jet drive still give enough water to run it . The hose from the water pump is as a guess 2 1/2 inch id . what could I use to go from the 5/8 hose to the 2 1/2 hose? It also has an oil cooler and fuel cooler built into the water plumbing system . The inter cooler also has 5/8 intake and dump hoses that I would like input on best place to plumb them into also please. I added a photo that may help a bit.