Illumina + S/T springs combo and 245-50/16 rears?

Hello All,

I recently purchased a 77 280Z that has 245-50/16 Yokohama av es100 tires in the rear. I'm looking to lower the car a bit w/ Tokico Illumina shocks and S/T springs, and was just wondering if I'll have rubbing issues due to the width of the tires.

If it will rub, what's the widest rear tires I could get as replacements?

Btw, wheels are 16x7, 0 offset.

Thanks