the reason the auto store list 2 is becasue up to a certain year, the duratechs used a certain sensor. In 1999 they changed the sensor. So some SVT's had one sensor and some had another. But the sensor befor the Pre-Cat's always remains the same. I have the Bosch Numbers for you to reference.
production date: up to 1/2/99
before pre-cat part # 13115 after pre cat #13133
production date: 1/2/99 and on
before Pre cat part # 13115 after precat # 13201
As you can see that the only one that changes on the spacific date is the ones after the cats.
Bank 1 is the Pre-cat next to the fire wall
Bank 2 is the cat in front.
I hope you can use the info I provided. Remember these are Bosch part numbers...I don;t have a cross referance for OE.
Roz
