Stop in for a cup of coffee

OK. It is typically the grind on the cam lobe or an offset in the alignment of the lifter bore that causes the spin. Sometimes both. If the lifter isn't spinning, I would check the cam lobe as close as possible. I assume you have the intake off to be able to have removed the lifter. You should be able to mark the new lifter and crank the engine over to see if it is spinning. If it is back together already, then you should be able to mark the pushrod and see if it is spinning. Some cell phones actually have a slow motion video feature. We were able to hand turn a cam in an engine and play back the slow motion video and see the cam bucket turning. In the end, I would be concerned with the cam. Is this the same cylinder where the rocker arm broke a while back?