lal Naja
one is mounted on the driver side front fender and I have a 3 1/2" convex mirror double back taped to it. It works just fine. The dash mirror is also in the standard position.
I mounted Ginger's dash mirror from the top of her windshield frame and I liked it so much that I'm going to make one for myself. I'll have two dash mirrors. If I don't like the looks, I'll just remove one.
When I first installed my mirrors I had someone to hold them while I sat in the seat. My mirrors are set up for me. I could never find a place on the passenger side fender or door to mount that mirror. I had Ginger to set in her Cobra while I held the mirrors in place to see where they worked the best. There is some adjustment in the mirror it self.
Take a little time to look at your locations and what works best for you.
Don't forget to RainX the mirrors
Dwight