My truck came with a pair of poorly mounted late model design aftermarket mirrors. I purchased a pair of correct aftermarket mirrors from LMC, but before I invest in rivet nuts and the tool required to install them, I'm not absolutely sure that the original mounting holes aren't there, covered by a layer of filler.
Before I start randomly drilling holes, what should I expect? I'll poke through my shop manuals, but so far I've been a bit disappointed with both the '63 manual and the '65 supplemental for stuff like this. I know from other pictures approximately where the mirror would be mounted, but can someone give me a measurement from the door edge? Thanks.