Come on you guys, nobody but this dumb retired ditch digger
knows what these things were installed by Ford are for? ;)
"All"??? Ford truck frames each only have 4 pointed rivets:
All the other rivets are common (rounded), and just hold
the frame components together.
Yeah, Ford had a use for all of 'em at the same time! :)
I'm telling you that as a hint, they have a -specific- use. :)
Maybe I don't remember right but I thought my Bronco had
six and my '75 F150 had eight of these pointed studs...
Here's another hint...
I fiNgured out what they were for back in the mid 70's. :)
Alvin in AZ
ps- I'm guessing Ford didn't really intend them to be used for
measuring. The company that made those frame dimension
diagrams made use of two of 'em, but that wasn't what Ford
went to the trouble and expense to install them for.
...is my guess.