67-73 Abody frame Rail and Rad Support

That explains the confusion....that later built cars had the old style mounts.
I was thinking that, based on how some things get mandated January 1st, that logically the later builds should have had what they would all eventually get. (Shock type bumpers)
The Superbirds had to be built before January 1st since bumper regulations would have put the kibosh on the nose cone, you know....stuff like that.