This question goes directly to Primaz, can you share the store or location where you bought your wheels? or share the exact size of the wheels you are running on your Z's? I found a set that looks exact the same as yours, but with a darker color, and the size is this: 16 X 8, 0 offset, and 4.5 backspace, and I am not sure if this will fit on my 77 Datsun 280z.
Thank you very much.