On my 58, I replaced the ones that were rusted solid (and not adjusted where I needed them to be) with a piece of 1/2" electrical conduit, squished the ends, and rounded with a grinder. I don't care if the arms are adjustable, 99% of the time, I am the one driving the truck and never need to change where the mirrors are, if I need to, just twisting the mirror itself works fine.
Are they show quality? NOPE, but neither is my truck, it is a working truck
