Help! Wiped cam lobes? - Video inside

the 268 I just gave to Inertia doesn't show any obvious wear on the lobes but a quick look at the lifters revealed 3 that weren't turning by having very obvious grooves in the bottom end so I'm with d55Dave start checking lifters , mine didn't put any metal in the pan and didn't backfire but I chased that ticking sound for months before taking extreme measures { bought a 410 LOL } . Once I showed Grant the lifters the cam went straight to the regrind shelf , If he ever gets around to building his car I'll probably give him a very good Hydralic Roller for his stroker once I replace it during my strokers next refresh .