if you have your PHS you will find on the car invoice a code 454 WHLS-RALLY 2 if the car came equipped with Rally wheels from the factory. This won't tell you which Rally wheels.

The Firebird 400 came stock with F70-14 Wide Ovals, which fit the 14 x 7 wheel. The 250 Sprint, 350 2 bbl, and 350 HO also came with these tires, and should have come with the 14 x 7 as well. Only the 250 1 bbl should have come with 14 x 6 in 1969, and cars ordered with snow chains (code 522 for 6" wheels)