looking at buying a jet boat right now. 19 ft eliminator which has a 468 BBC out of a drag car. I've been told you have to make different upgrades when running one of these motors in a jet boat. As far as springs, valves, camshaft etc.. I don't want to spend 10k+ on the boat and have to do all that to make it reliable if its the case. Any help? Thanks!
A good first step would be to find out what the cam specs are? Many high performance street engines have large overlaps which in a boat with wet exhaust can result in water being pulled into the cylinders through the exhaust valves. Next find out what Rpm the engine was built to make power at. There is no point in having an engine built to make power at say 6,500-7,000 Rpm if you want to cruise at 3,000-3,500 Rpm.