Re: ford 460 intake manifold
The OEM marine intake would have been the same as a castiron OEM auto intake. Beware of using an aftermarket aluminum manifold for two reasons:<br />1) the aluminum won't hold up to raw water cooling, even more so if it is exposed to saltwater.<br />2) a lot of the available after market aluminum intakes, such as Edlebrock Performer RPM, have performance ranges(torque Curves) substantially higher than what you want for a marine engine.