[corvettejim1968]

so I started with a piece of cardboard for a template.
taped it to the door and used a razor blade to trim it to the shape of the door.
Then I found the 3 holes feeling around and dimpled the cardboard. Then I took a screwdriver and poked threw. Took the template off and flipped it over and installed it on the other side and taped it down. used a marker and the new mount a to make perfect circles. then a center punch. drilled very small holes just in case it did not line up. then a used a uni bit and drilled one hole. with the door panel removed i could see i nailed it perfect. next i installed the first bolt with mount so i could drill the next 2 holes perfect as well, you cant trust the marker circles 100% so only drill 1 hole from the marker and the next 2 off the mirror mount while its in place. if you drill the holes just right the bolts go in tight and all you need is lock tight.