I was smelling gasoline and noticed a puddle under my Bonnewagon. Yup, fuel pump was dripping. I knew I had some new ones and found four that only had the two lines- in and out. I needed the third line for re-circulation. I kept digging and I finally found one that had the third line. It was an NOS Airtex Pontiac V-8 1970-71 that I had bought at Englishtown swap meet probably back in the late 80's. It looked perfect and I installed it. It seems to work OK but I am concerned about the age. Do they fail from age or use? The dripping pump was probably 20 years old. This NOS one is probably 30 years old or more.