You don’t have to believe me. Look it up. Search “why is the rear axle narrower than the front”. That will show you that you don’t know what you are talking about. I believe you set up sprint cars about as much as you being an engineer. If you were an engineer, why are you asking about putting spacers on your car. I suppose that driving at a whopping 20 mph, you wouldn’t notice any difference. I’m done arguing with you. You have now been ignored!