[Zedder]

Art didn't respond yet, but John did. He had no direct knowledge of the 409 build but mentioned that perhaps they did something different given the different angle. As I think it was Phil that commented the best way to "prove" the block hasn't been messed with is to compare it to other known originals. The pics you posted look pretty good (although the stampings on one are pretty crooked for a factory stamp), so I'd feel better about your block now. I tried to find some other pics on-line for you but they are nowhere to be found.

I'll see if I can get Art to comment.