65-85 under.

[Steve Stasko]

Originally Posted by Paul Precht

Would you then be in favor of running a manifold from an Olds that came on late 50s engines along with an AFB that flows 575 cfm in place of your QJ that flows 800 cfm. Would you give up the valve to piston clearance and long stroke that allows you so much more cam than the 426 SW can run.

Why would anyone run the 2206000 intake, when you can use a '68-71 440 HP intake? I certainly wouldn't use the 516 heads either when I could use a 915 that's 19 cc larger on the intake side...

For what it's worth, I have a '65 Coronet 426 SW car, and have had no issue finding those intakes or heads that they were originally equipped with.