1970 Rims

For a stock 1970 240Z, what is the maximum rim width (assuming 0” back-spacing) that will fit inside the rear wheel wells without rubbing on the fenders?

I’d like to install 225x60x14” (or 205x60x15”) tires on 5-slotted, dished, brushed aluminum rims (maintaining the original overall wheel diameter of 24.7” based on the stock 195x70x14” wheels). I’m not sure what the width of the stock rims is (5” to 7”?) or what rim width to purchase for the new tires that won’t require trimming the fenders.

I have located used 5-slotted rims in 7 1/2", and 8” widths (can’t find them in 5” to 7”), but have been told that the wider ones will rub on the fenders. Does anyone have any hands-on experience with this situation on a stock 1970 240Z?