torque steer

I don't know. If it were me, I'd be checking to find something broken, not limited to

cracked spring leaf, broken spring centering bolt, and would "suspect" the numbers from this 4 wheel alignment.

CHECK YOUR TIRES pressure LOL

A cheap way to see about spring loading would be to --even if temporary--- buy rear air shocks with individual fillers, this would allow you to play with loading on each side