Square wheel setup pros/cons

I was able to get my hands on a set of OEM style 67's at a great price. I'm having them refinished but I'm wondering if I should take my two rears and add them for a square setup. I know one of the benefits is being able to rotate the tires.

I'm not tracking the car, it's strictly a weekend cruiser. Would you do a square setup or keep them staggered?