After pulling the Hemi engine out, I started to disassemble the top end of the engine. So far, everything looks good, and the parts appear to be quality parts. But as I stated, I have no way of knowing if my engine has one of the improperly hardened camshafts in it. The camshaft is not showing any improper wear,but the engine has only 6 hours of run time on it by Cummins on their dyno. My friends engine passed the Cummins dyno test,and the camshaft failed shortly after the engine was installed in the car.