My OEM shroud the car came with did not have them, but when buying this replacement in '97 the guys had just tooled up for them, found at Cypress Garden show....and so they said that for a '72 they unsure if needed or not, so I assumed for another year application....mounting the fan shroud, a plate off mine on top center did not line up with them nutz, other than that, no clue...
I would bet you have a replacement support, which is good, it's about 1/2 the weight of the OEM....even WITH the rust removed....
BTW, I drilled holes all through the bottom edge of my support, and dumped tons of paint down there till it ran out....then installed it.....
I at least tried to stop the rust on the new unit....
:crylol: