I was looking at the picture again at the top, what is sitting on the fold down section in the cars?
Looks like nothing - just the floor section of the unibody - fold down removed . Shadows may be playing visual games with the eye
Jeff, do you have a pic of the hood latch area to show the type of bolts used? Looks like there are no latches in that pic above...
Same as all the Mustangs
From observation it appears that the latch & grill support was normally attached to the radiator support using the bolts with the star washers - heads possibly with the anchor markings
The latch to the support bracket varied during this time period - star washer at the beginning transitioning to flat washers at the later half. Do have examples where the latch to support is stars while latch support to grill support are flat/smooth washer. Radiator support to latch support still star
Useage likely overlapped
6R165xxx Hood latch hardware
6S1536 Hood latch hardware