Mopar 413/426 Max Wedge block casting number confusion

Appreciate your opinion, it may not be, but all outward markings on the block , that can be seen topside (paint over pad) would indicate a max, which is great for me as I want to build a 63 Savoy 426 max wedge.clone. If someone shows up with a borescope or mirror, they won't get near the car, lol
So... Any way you slice it, I'm happy