To be sure, I recommend:
1. Consulting your owner's manual: This is the best resource for precise location details specific to your vehicle.
2. Using a repair manual: A Haynes or Chilton manual for your vehicle year and model will have diagrams showing the PCV valve location.
3. Searching online: A Google image search for "1998 Chrysler Town & Country 3.8L PCV valve location" might reveal photos of the valve's location on similar engines.
Remember to be careful when working around the engine. Make sure the engine is cool and disconnect the negative battery terminal before beginning any work.