i have a 1993 32 fever with 502 mpi’s. Both run great, have good oil pressure. My question is when should I expect to rebuild or do top ends? The boat has roughly 700 hours on it. Who does port work, what can be done to the intake manifold, which exhaust manifolds should I go with, and what cam kits has everyone had luck with? I’m not looking to build a race motors, just slight upgrades. If I pull the motors to do top ends I want to put new rings and bearing in while I’ve got them out. Currently running 26p 4 blade hydromotives, with doing the above upgrades what do you think I’d need to re prop to?