The holes in my 54 3100 have been welded over so finding center from the inside is not an option. I also want to install the proper mirrors from LMC and have ordered the chrome ones. Could someone take a picture of their truck mirrors with a few measurement stickers from some prominent points on the trucks body and included them in the photo that should get us close enough to find our centers. It would be a great help to all of us...just an idea and THANKS, Steve