Is Your Water Pump Overdrive, Underdrive, or Neither?

I notice my coolant temperature creeps up at stop lights. The pulleys are not factory (since the previous owner removed A/C). Now I'm wondering if messing around with pulley diameters (crank vs. water pump mainly) may be a factor at the stop lights. The radiator was recored by a reputable shop. I don't know what variety of ratios Chrysler used back in the day. Might be something to think about. I'll have to do so measuring tomorrow (pulley diameters that is).