Do you have to drill the hole in the vertical rubber piece????
As I remember the mirror was held on by a THIN nut behind the metal trim with another bolt on the inside.....but I may be wrong or the ones I've seen are wrong?

1937 Chevy Pickup
In the Gallery
1952 Chevy Panel
In the Gallery
More photos
1950 Chevy Coupe
Pictures!

I'd rather walk and carry a Chevy hub cap than ride in a Ferd.
I can explain it to you, but I can't understand it for you smile