Would my Duster run cooler with an electric puller fan?

I have a few thoughts:
1. I tried an electric fan setup. Even with a shroud, it never cooled as well as I would have liked. I wound up going back to a Stock fan and shroud setup. Along with 2, and 3, I am OK now.
2. You need to make SURE you have a good hood to radiator seal in the car. I notice that that seal is missing in most of the Mopars bodies I see. That will help force more air through the radiator. Also, if there are any gaps between the fan shroud and the radiator, you should seal them. Every little bit helps. Assuming your your radiator is OK, it is likely a problem with the amount of air that actually flows through the radiator.
3. I am a big fan of Royal Purple products. I put two bottles of Royal Purple Purple Ice in the radiator. Did that help? I don't know. I didn't do a very good before and after experiment, but I tend to believe that Royal Purple would not falsely advertise a product.
4. You need to buy a laser no-touch thermometer. They have gotten pretty cheap ($19.99 now at Harbor Freight). Using this tool, you can see what the REAL temp is going through the thermostat housing. You can't imagine how handy they are.