Tips Installing New headlight adjusters
You could try the 66-67 type I think the hole is the same shape / size, as the fender in the photos below is a 74 up fender on my 67 (long story)
Here are photos of how my 67 work. (I was going on memory in my earlier post)
Compare OE to Repo
Remove screw
slide metal part up off of plastic part
insert plastic and metal part into opening in fender
Use socket to press the metal part down use your hand to keep back pressure so not to bend the support
On a side note the small screw holes next to the square holes that the bezel retainers should go in graphically illustrates the difference between a 74 up fender and a 67 fender. (wish I had known that BEFORE The body work and paint)