It definitely sounds to be central to rear of the engine. Sprayed WD40 in the distributor and put dielectric grease on the contacts of the distributor rotor and cam position sensor. No change. And there's absolutely no wobble/play in the distributor shaft
Tomorrow I'm going to pull the intake to look at the roller lifters. Maybe a roller is going bad
It's DEFINITELY not up front by the timing cover or dampner.