[Keithc8]

If the lifters are fine then the camshaft lobes should also be fine. I have had this happen on the dyno and the cam bearings spun in the block. This ate up the camshaft and the block and gained lash like a cam going flat. The FE with the groove cut behind the cam bearings and then the cam bearings being so narrow will cause this. Usually you see it happen with bigger camshaft and spring pressures. That is why we use roller cam bearings now on most of the high lift roller cams with the big spring pressure we are now running. I feel your pain, should do this crap for a living. Good luck