Grinding, " diesel " noise under valve covers

Thank s To ALL the Mopar Brothers Here, i ain't done yet! Once we get done with this darn rotted up 2nd story siding job, my Bro here is going to come listen. He swears it was a healthy sounding, still new motor. But he can't be too sure.. we drove it together a few times. Never popped the hood. I nailed it, and he said " I did something wrong, really wrong.." I asked what he meant. He said " my 460..." lol. So I'm gonna put the pump back on, run it till it's warm, w/ a 2nd set of ears, to see if it subsides. He thinks the rockers are too close, and they are rubbing. I dunno. I still have to cut the oil filter open. If that doesn't do it, then there is this

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