im looking for cam recomendations, i running a .030 over 350 with flat tops,stock rods,basically stock vortec heads, short headers,aluminum intake, and 4-barrel holley.keep in mind, that i am doing all this on a tight budget. i am putting this motor on my airboat and with the prop and box stup that i am running, i need to make max torque atabout 5500 rpms(only to be used in emergencies). id rather not do any machining to the heads for valve clearence, but would also like suggestions on valve springs. thanks for any help.