Fuel line difference
 

I've noticed that most of the fuel lines running to the rear of the car have a screw in filter just before the rear axle. Some like this 89 firebird also have a threaded fitting on the feed line coming off the sending unit. Some like the 85 Camaro slip on and have hose clamps. I've got a complete set front to back that don't have the filter design. Doesn't ha the transmission tunnel crossover bend either. What year did it come out of?