Converter stall speed recommendations

What stall speed would you all recommend for a warm 318 Duster, used for street driving only, with 3.91 gears. I would like to keep it as economical as possible with the gears (it's all relative of course). 2200 rpm range and a 10" converter? There will be some freeway driving at speeds no higher than 65 mph. Tires are 255/60/15s.