Michael, I'm hoping to pull it here in the next couple Weeks and see what happened. The truck went from "fine" to knocking in about 500ft of half throttle pull. Hadnt run the truck in over a month. I pulled right over and shut it down, started it for like 10seconds to watch the balancer wobble around like a Bobble head doll. I towed it home, logged it 5 more seconds, and there she will sit. Not really sure what to try this time...filled block? Billet crank? Anything that'll get me through a full summer would be nice