I have seen stock Chrysler 3.3/3.8 V6 heads break the rocker stands like that. I'm sure that's not a harmonic or spring pressure issue. These heads are sand cast and casting flaws happen. I'd fix as stated above with the rocker stands and not give it a second thought.

"Follow me the wise man said, but he walked behind"


'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.