This is part of the 3 piece LH /driver side front wheel well trim. It is the longest of the three pieces which is mainly for the center arch. The research information shows this trim was used in the early production of the 67 GS series, so some cars built in late 66 or early 67 may have this 3 piece trim style. This is information that I found so it may or may not be correct. It's a very nice piece with no dings, dents or scratches, only a small nick at one of the mounting screw holes but not noticeable. It has been polished so its ready to mount. I only have the one side and not the other two pieces. I think it's a harder trim piece to find than the longer trim normally seen. Price is $85 plus shipping to your location.
If anyone is interested the shipping cost is between 28-30 depending on your location for the tracked parcel