The stock magnum heads do have a flow limitation, and a lift where they start giving up. Find the video I was talking about. A slightly hot a cam would be the ticket in my opinion. And don’t be afraid of lift, however, let’s not go crazy.
To be honest! Finding a copy with something very similar to the Mopar cam in the 380 hp 360 engine would be an excellent way to go. No shame copy cat engine building because it’s just simply paying homage to the original design and builders of it.