ford man
Bronco Guru
Yes in agreement with Jaxgtc, sport broncos with argent grills had matching wheels and the base (non-sport) broncos had white grills with white wheels.
I know this is not 100% true I know of 2 explorers that had white grilles and know for sure they came with gray wheels. I would think that it is possible to get white but I believe that gray was the primary color for 73-76.I do know that scoop on this forum said that his 74 ranger came with white wheels and his father-in-law bought it new so I do think it is possible but not common. If you look at old ads they all had gray.