Hi Jose, If you have the federal emissions package (not California) then you have 1 O2 sensor (narrow band) upstream of your catalytic converter, and 1 narrow band sensor downstream of your catalytic converter.
You probably do no t have the California emissions package because you are in Florida, but if you do then you have 2 O2 sensors (narrow band) upstream of your catalytic converter, and 2 narrow band sensors downstream of your catalytic converter.
The Quad Digital EFIE would be the best choice for your Dodge Durango.