head thickness valve train noise

This cam?
https://www.summitracing.com/parts/cca-20-225-4/overview/make/dodge

9 lbs vacuum at idle with that cam would be pretty much normal, that's a pretty aggressive cam. All I get with the Lunati 60404 in my 340 is 9-10 lbs at idle, and that's a smaller cam than yours.

Is the noise happening while your parked and just bringing up the rpm's? Or is that while you're driving? That cam has a range of 2,300-6,500 rpm so if the noise is while you're driving you're lugging the engine, and it could be detonation. What is your compression ratio?