SS Dana Axle?

SSing said
10,5" X 29,5" till they star working inside of wheel well. As form Hurst, it is in the Guide I believe.

But was 10 1/2” slick the written tire rule for the 1968 NHRA season?

I know there was a tire rule.

What the rules changed to in 1969, 1970, etc are irrelevant to the initial design of the car.