There's no large, easily identifiable "distributor box." What you might find is:
* Individual Ignition Coils: These are relatively small, cylindrical components, often black plastic. They'll be near the spark plugs.
* Ignition Control Module (ICM): This is a small electronic control unit that manages the ignition system. It's usually located somewhere under the hood, possibly on the firewall or near the ignition coils, but it's not a large box. It might be attached to a bracket or hidden behind other components.
* Wiring Harness: A complex network of wires connects the ICM to the coils and to the engine control module (ECM).
If you're looking for a specific part, knowing the exact engine (e.g., 4.0L SOHC, 4.0L OHV, V6) will help significantly in identifying the correct components. A repair manual or online parts diagrams for your specific year and engine will be invaluable.