[unruhjonny]

ok.

After reviewing what I found, that second picture (if I am seeing it correct) looks to be a pre-1973 fender.

Hopefully this works:
(images have to be smaller, or they are scaled down by the site)

This is a pre-1973 fender brace - note the two mounting holes for the inner fender (circled):


This is a post-1972 fender - note the two additional holes for the fender brace (circled) - they are also in a slightly raised pad so that the cage nut will not touch the inner fender:


This is a portion of the last picture beside a 1973 fender which is using those two holes;
I believe that this "leaf spring" style brace was from 1973 through to 1976, after which it was made to be much smaller (and only used one of the holes - but both holes remained):


Here is an image of the bracket included on 1970-1973 fenders to attach the valance (I found this image in another thread here - please note that it has been shortened/modified):



I will say this because it is worth repeating;
The only times that people here nit pick an early car having later fenders (myself included) is when a cream puff type car presents itself - and is presented as all correct (presumably in order to get absolute top dollar).
I'd think that well in excess of 95% of car show spectators would not notice this.

As an example of how little details are missed, the one time I was at the Trans Am Nationals I spoke to a gent who just restored two beautiful 73-SD455 and 70-RAIV cars;
I asked him why he had the wrong floor mats in the 73 - and I seem to recall that he was quite surprised at me having noticed this.
Many people don't notice little stuff like this.

Just look at how many second gen cars are running around with colour matched columns, and black formula steering wheels! (the column and non-formula steering wheels were always colour matched to the interior).
If most people don't sweat steering wheels, why spend time sweating an original versus a replacement fender?
(but if you have the time, and want to find a original fender, more power to you.)

I hope this is found to be helpful to someone.