Im more worried about injecting the fuel in time, and having an ECM or ECM/FICM combo that is happy at that speed. Valve springs and cam will be addressed. A drive shower is no problem.
find a good used #6 or nxt and be done with it!!!! dont screw around with little bravo drives those are for 350 mercs and 496's!!! youll be wasting alot of time and mooney if you wanna put a puny bravo on there.. trust me im an avid boater and have a 2005 eliminator daytona with twin 800hp merc motors. even the most badass bravo XR(which is the best bravo) that has the craziest internals you can buy cant even handle a high hp big blocks torque and breaks once a season. dont mess around and do it right the first time and never look bad and have a great peice of mind... sorry for the rant..
After some thought, I have decided a duramax would be a good replacement motor for my 26 ft wellcraft nova.
Goal is 500hp motor that will turn 4500 rpms all day long. I was thinking rods, main studs, head studs, and some of Guy's head work. All fed by a stock turbo or cheetah NO dual cp3's. This boat will be used in the Gulf of Mexico so it needs to be pretty reliable, hence the reason for using only one cp3.
Now I dont know how to deal with the stern drive issues. The boat has a Alpha one in it now, any boat guys in here?:rofl: I need to do some reading but I believe the Bravo one is a more beefy drive.
Any thoughts?