Hi Chuck,
This is a UK Special on the side that is least likely to have been rebuilt. I'm pretty sure the other side has had repairs to the underside of the front cavity below the spare wheel.
I laid a straight steel box section across the top of my wings with the front edge at the front of the bodywork above the headlights and dropped a plumb line from the front edge. See the pictures it's clearer than explaining!
The centre of the repeater indicator, where the bulb fits, is 25mm back from the plumb line, towards the rear of the car, and 140mm below the bottom of the box section.
Hope this helps,
Richard