Separated the NJ built car discussion
Now to some pictures. Here are some examples of 65 K code snubber brackets as attached at Dearborn to the unibody over the rear end center point
Early 5F160xxx - Mid 5F330xxx - Late 5F622xxxc
Notice that they are shapped differently than the examples you found on the internet. The also have only one hole in the middle and no provision for the 8 inch style bumper to be attached to them
Pictures of the subber bracket typically attached to the pinion retainer bolts at the front of the third member
PLEASE ignore the paint marks
Hope this helps