As one can imagine, once the 'stance' is set, front end alignment is needed.
Picture, if you will, sitting to the side of a front wheel, X amount of caster is shimmed in, say 1/2° neg - Camaro sitting level.
Now, raise rear of Camaro, caster is lost, changed towards positive.
Steering now wonders at high seed.
Caster needs to go back into alignment, and Camaro can be shimmed for as much as 3° neg.
Toe must be reset also as now as contact patch is in a different place on the tire.
Regardless of tire/wheel size/stance is chosen, a four-wheel alignment by a good alignment tech is needed. Not just one who reads the book and sets it by the book, needs to be set by real world usage.