Differences in bumper/brackets?

[AllGoNoShow]

I can’t seem to find the post now but I remember seeing one here where there were pictures of the front bumpers of two different year trucks which showed the differences in the spacing of the outer most bumper holes. I have a 68 and the previous owner swapped out the front bumper and never reinstalled the outer braces (which he gave to me but I am assuming they are original).

I tried to reinstall the braces and they are too short so I am assuming he swapped in a different year front bumper. Trying to figure out what outer braces I need and from what year so I can purchase them. Thanks!
Posted via Mobile Device