My dad recently bought a 1969 (I think anyways) Lund fiberglass 20 foot deep hull heavy as fugk fishing boat. It came with the "upgraded" 4 cylinder Inboard/Outboard engine rated at 130 HP. We're trying a different pitch 4 blade prop this season and seeing how it works, but as of last season it was almost unable to get up on plane with two people, full tanks, and a decent amount of gear. I spent entirely too much time fixing up all of the little things this winter and getting it to work right, and I'd like it to be able to get up and go when we're fishing big water and a storm is coming. I want to swap in a V8 in a junker boat I found, but that would add about 400 pounds to the back of an already stern heavy boat. Do you all have any suggestions on getting more horsepower out of a 3.0 liter 4 banger? Remember this is a marine engine so it's all about top end here. Forced induction is kinda outta the question since I really don't want to rebuild the motor. Does anybody make a hot cam for an old 3.0?