Not positive, but I think that with the factory low profile air cleaner assembly the six pack will clear most stock hoods. I have an all new six pack I plan to use in my '64. Haven't mocked it up yet but I could do it sometime to get a measurement from the bottom of the manifold to the top of the air cleaner. Also, if the low profile assembly that 74swinger is talking about is the stock one, you can probably get it cheaper if you shop around. I paid $271 for mine.
