Wheels-Tires Wheel offset help.

[Black87trunk]

I’m not sure if this is the correct place, i have a 87 trunk car and I’m ready to upgrade my wheels and tires, however I can’t find anything to help me with the offset. I’m looking at the XXR 530s but I really want to know what offset to purchase to fit my car and not have any trouble with the dust cap or any rubbing issues, I have drop springs in the car( unsure at the moment how much drop) I will need to double check that. Here are the wheels I’m looking at.they don’t really tell me what options I have as far as offset or backspace. I will be running a 16” wheel.