71 or 72 Sport Mirror Location

[GSD Guy]

Wondering if someone would be so kind as to fill me in on the location of the mounting holes for the sport mirrors on 71 or 72 blazer (I'm assuming they will be the same for 71 and 72). All of the holes on my doors were welded up (had large tripod mirrors and wanted to switch to sport mirrors). Probably gonna buy the reproductions from LMC unless someone has had a bad experience with them. A picture marking the origins of the measurements (probably top of door and front edge of door) would be great to help be more precise (there's always room for interpretation when info is passed along!) Thanks!!