I started NHRA Stock class racing in the early 1970s, we ran 7.60.15 Firestones on 5.0 inch wide steelies on our 1968 GTX A/SA Hemi car, we later switch to a set of Fenton 4.0 aluminums wheels. A lot of the other Mopar B bodies ran 8.00x15 and 8.20x15 front tires
I had a set of Stahl 8.20x15 on my 1963 Plymouth Belvedere stocker 415 HP M.W. car, I did have to turn the torsion bar height up a little bit to make them clear and steer better