We've had quite a few 100+ temp days so far this summer. The new radiator has been good on the highway, around town, or at the beach. Temp gauge climbs to thermostat setting and stays put. I can't say how a single core radiator would do, but I'm glad I spent the extra bucks for the peace of mind.
93 YJ, $3500.00: What I've done so far - tires; Soft top & frame; turn signal switch; plugs, cap, rotor & wires; new fluids; mirrors; 2 row aluminum radiator, water pump, hoses & thermostat; brake lines and hoses; Transfer case output seal; rear diff crush sleeve and yoke seal; rear wheel cylinders and shoes;