Doug - if you take off the inner door panels you can see the reinforcing plate inside that has the threads to attach the mirrors .... the 55 assembly manual is available from all the vendors [US or CDN], worthwhile to get one

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics