Overdrive crank and water pump pulleys

looking for overdrive crank and water pump pulleys for 68 340 barracuda. Water pump outlet on drivers side. This is a after market a/c from classic air unit. Car runs cool when driving down the road but when it sits and idles temp goes up. I don't think it is pulling enough air with the under drive pulleys that are on it from march performance. Any help would be great.