Help convince me to go BB in my Duster?

You just need an electronic ignition distributor for the engine you get. It might even have it already. It will plug right into your duster harness and your good to go. You shouldn't have to do anything with the wiring.

So something like this should cover it? Might as well use a new coil, wires, etc..
http://www.jegs.com/i/JEGS-Performance-Products/555/40506K1/10002/-1?parentProductId=2392919