M3a1 pintle socket locations

[RK1944]

Hello all, does anybody have ready access to an m3a1 that can tell me the distance between the rear armor and the edge of the side pintle sockets? I have the rear one installed just dont have referance on the sides

[Jesse]

From the surface of the rear armor, it’s 59 3/4” to the center of the rear hole on the top rail.