rearview mirror location

[mattpadl]

wondering if someone can tell me the factory location of the mirror bracket on a 65 c10.
the measurement from the top of the windshield rubber too the bottom mount screws would be nice, thanks

 

[markeb01]

Perhaps the factory accessory installation page from 1960 will be of some help. I assume it is the same through 1966. Unfortunately there are no dimensions included.