...nvm

I have spun a bearing on one of these, if your having the sounds like the video its likely not a bearing. Its likely the heads (lifter, rocker, spring, etc...) When mine spun the bearings it sounded like a dam diesel at idle and the engine was shaking like it was out of balance. I knew something major was wrong, just didn't know what. Drove it 2 miles (ya ya I know) to get to work (dealership) and put her on the lift. I have pictures of the bearings if you want to see them... they look amazing lol.

I have heard of springs breaking and it causing similar problems, I would say to pull the rocker covers and give them a good look over before pulling the motor and getting really deep.