Something I just Need to Talk About

Thanks, everyone. I have to admit that the 300 is really growing on me! I'm going back down this Thursday and will get some more pictures of the fender tag and so on. About the engine stamping - I'm guessing that the "42" stands for "426" and yes. the HP stands for high performance. But what was the significance of "high performance". Were all the HP engines "Street Wedge" type?