Intake identification

I have been collecting some casting numbers on my engine during the rebuild and I noticed one difference.

Like I have earlier writed that I have original E code Barracuda 1967 Notchback ( 273, 4bbl, 4 speed).

On intake there is number 2536563 and if I look My Mopar com Intake casting numbers it gives 2536536. Is that mistake? Or if there something special behind on my Intake?

2536563 is the casting number for a 66-67 4 barrel intake according to my Galen book. The 536# must be a typo.