There were no rear view mirrors from the factory until the 1950s. Trucks came with side view mirrors.
Here is a collection of "home" engineered setups for rear view mirrors.
The best thing to do is find a bracket and mirror that you can adapt to your truck.
Good luck,
Harold
Attachments
1946 mirror 1.jpg (43.2 KB, 104 downloads)
1946 mirror 2.jpg (15.86 KB, 104 downloads)
1946 mirror.jpg (19.81 KB, 101 downloads)
Rear view mirror location.jpg (42.41 KB, 99 downloads)
Mirrow Rear View & Bracket.jpg (40.35 KB, 96 downloads)

Last edited by Harold46; 01/22/2019 10:32 PM.

Harold
Is a restoration ever finished?