HP2 IS simply the designation for the second and most informed know that, many engines HP and otherwise were built on that shift. I have commonly heard that a great percentage of the A12 motors were assemblied on the second shift, BUT NOT ALL, true or not I am just restating what I haved heard, but qualifying it as such. Sometimes when statements like that are aired out, someone with some facts will come forward to discredit it, that is one of the good things about this forum, there are many people in the know on here. HP2 confirms or denies anything, it is just what I have heard as a common theory. Fill me in though, I have no problem being corrected, just ask my wife.

Has anyone else heard of the A or AA stamping????