Symptoms of wrong cam installation

I passed along the info to my brother from this thread for what he needs to check, plenty of good info here.
It should be said that prior to the install of the eddies and “ new cam” along with the 8 inch vert, the car ran very respectable 12.70’s with just bolt ons, stock iron heads, and a small comp flat tappet cam, along with a 10 inch vert. Ran as good as it should have at that point.
The introduction of good heads( they were previously on a 408 that ran 10’s) the new vert and cam didnt do much of anything over how it ran before, which gave me the thought about the install of the new cam being wrong