Mopar 413/426 Max Wedge block casting number confusion

Josh owen said

Absolutely, like I said I personally never checked into it. Im going soley off what the buyer told me after he pulled that one apart so I have no proof if it was legit or not since the whole thing was so uncommon it should have been a 440 from factory but clearly wasnt!

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I have seen a couple examples of 413 bored out and sleeved to 440. Also in motorhomes interestingly enough. One of them was a 1970 that my neighbor bought new. Claims to have never had any engine work done. He just parked it after his kids went off to college and left it to rot.