Historical tire sizes

[68camaro]

I am new to vintage racing, 68 Camaro in A-Sedan or TA class, with about ten races under my belt.  I am looking for information relating to historical tire size.  SVRA allows for Hoosier 10 inch tires for the AP corvettes, my club CVAR allows them generally if you can make them fit!  Is there any information regarding whether or not any first gen TA racers used 10 inch front tires back in the day?  Actually front or back the ability to run the 10/25.5 versus 9.5/26.5 in the back allows for some effective gearing options as well.  SVRA tire grid allows the 10 inch tires for the second gen Camaro and it seems reasonable to me that there would have been overlap in the model years and perhaps some tire utilization overlap as well.  Thanks. 

[Bruce302]

T/G racing, Jerry Titus and Terry Godsall, ran some "rear tires" on the front of their Firebirds according to some reports.
My guess is that they used 7.00 x 15 but couldn't be sure. Perhaps a search of photos and period articles would uncover some specifics.