Mopar 413/426 Max Wedge block casting number confusion

After tons of research, and talking to experts , the block is not a Maxie. It's a std 426 motor 1964 even though all the block markings are for a 413 ????? No
One has a take on that.

Several possibilities:

Truck block
59-65 Passenger car
A simple dial caliper on the bore couldda told you all that many moons ago.