Passenger side, or when you are facing the engine, upper left. It's correctly referred to as the right side of the plenum chamber across from the air intake and throttle body......you can't miss it. : )

 

Thanks, will look for it and if so will take pic and post it for future dodge forum members.
Also I bought NSK Platinum Spark plugs and Xact Wires said best match/fit for my car.

Was wondering if I could take and engine and tranny from new 6cyl dodge avenger and put it in my 1999 avenger?

 

Do they make the quick strut /spring combo yet for 1999 Dodge Avenger Es V6 yet