Another 440 Intake Question

AndyF said
I think a dual plane would be better for that car. Either a factory cast iron version or an aluminum copy. Mopar sold an aluminum dual plane for years and Edelbrock might still make the low profile dual plane.

AndyF said
Your goal was 500 hp and a low profile dual plane will support 500 hp.

This a very reasonable suggestion. What is the 'land yacht' to be used for? Having tested it, the power difference from off idle to 3,500 rpm will be substantial with the suggested intakes, and how often is the car going to be used above that rpm range?