If "our goal is to increase oversteer" (in other words, less understeer) = add a rear bar.
I generally run as much caster as I can (most ever has been +7.2), which improves bite, feel, and tracking. Seems universal so far (Mopars, Camaros, Mustang).
Dual-purpose road course & street in mild to medium efforts has always given me a better street car. Different from dual-purpose drag cars I've had.
For a separate track tire & wheel, not only ventilation but lighter weight will help: less rotational mass & unsprung weight.