If A Car Came With Heavy Duty Suspension....

On my e-body they put a half leaf on the torqued side.

He probably doesn't know what you mean, or he would not be asking

ALWAYS the heavy stuff is on the passenger side. That's where the torque reaction affects the car, and why on cars without limited slip axles, they almost always spin the right rear first.

(4x4's and front wheel drives try to spin the left front)