440 Camshaft recommendations for up to 6-6,500 rpm?

Put it in neutral and stomp on it. It may make it to 6,000 rpm a couple of times. I think we are looking at the need for more than a cam change, but a different engine design as others have alluded to.

I can hear the Boss singing 'Glory Days' again so here it goes one more time......

'Pop's Engine' another 440 on the dyno.