Wayne I think you got it right>>>>
Tires are the answer. I can still remember the up-roar over soft footballs. Looks like someone could talk a tire maker into making an 82-84 X 10" hard right rear, I'm not talking about a Focus tire but a full size Midget tire. 2 tires one compound.
https://www.indianaopenwheel.com/alb...pictureid=3112