I just bought the stainless brake line kits and the fuel line and the fuel return for my 9 of 1971 240z, but there is one extra line that runs from the rear to the engine compartment. I have 4 lines that run along the trans for my 240z, the main brake line that runs to the master cylinder, a fuel line to the filter and a fuel line to the other side of the engine im assuming the fuel return, but there is also one smaller line that also runs to the fuel filter and connects to another hose, would this be the Fuel Vapor line? on all the places to buy a fuel vapor line they say only for a 72 but mines a 9 of 71 so i wasnt sure if i need this fuel vapor line too