Stopping the knock: Lower compression and ported heads...

I have 3 440s in my garage. One is an 80,000 mile 1971 version from a Chrysler 300.
I see no reason to pull this 493. I'll just pull this Lunati and slip in something oriented towards" idle to 5500" power. It is just a matter again of....which cam to choose. The 493 is 12% larger in displacement compared to a 440 so is it fair to guess that I need a cam approx 12% larger (In lift and duration) than a 440 Magnum cam? I've read good things about the MP 528 solid.