I have a 21 foot Sleekcraft open bow with a 454 and a berkley jet. I just bought this boat as a winter project. The engine is out and has just been bored 70 with Keith Black pistons with oval port 113cc open chamber heads with 9.5 to 1 compression. I am thinking a Edelbrock Performer RPM intake and haven't a clue on cam. All my older hot boat magazines (1997 & 1996) in the jet tech area suggest 240intake 246-250 exhaust @0.50 and 112 degree lobe separation. I know Greg Shoemaker has forgotten more that most of us will ever know about jets but since my books are so old does this advice still hold or has there been new cams in the last three years? I'm not too tight to renew my subscripton but I can't wait months for a article to come along that answers my questions. Any recomendations are welcome