Thanks for the information.
I'm guessing these heads would still have the valve seat issue since it is a pre 2009 head. This Hemi has the same letters for each head. I don't know why and probably doesn't matter at this point.
I have a second pre 2009 Hemi and the head letters for left and right are different.
I am years away from needing the motor to run but I want to keep my eyes open in the mean time for another set of heads.
I appreciate your help!