Gentlemen;
I think Brian was probably right about the 'offshore' lifters getting into the mix.
When a lifter goes bad, the center is "hollowed out" and it acts like a cutting tool for the cam lobe. This is worse with dual or heaver springs for our applications.
In the 'fifties' we just had stock lifters to use. They had to be checked regulary due to this condition.
I guess the answer is to find a way to check the face of any lifter for hardness prior to instalation.
Does anyone know if SBC lifters will fit the 'later' six?? If so, we could get ours from a Hot Rod supplier like Jegs, Summit etc.
Oil may have changed but I don't think that fact would single out a lifter/cam & there would be damage elsewhere as proof.
Counterfeit parts are everywhere these days. The aircraft industry has gone crazy because of it.
Expletive deleted
