Fuel lines - why have 2 ?

67Dart273 said
The problem is that if you end the line "down under" it may siphon. It does not hurt anything in the engine bay. You need either leave it there or rebuild it to the old 69 type You can easily get yourself into a situation. You can end up with an unvented tank, a vent that siphons fuel overboard and so on. That line does not weigh much and it does not hurt a thing, and it is necessary.
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The tank has 4 vents already , I’m very confused on why one needs to go all the way t the front of the car . I’ll buy the line I guess . If my 5 A body’s didn’t have have the affine line going all the way up front not have 4 vents tubes at the tank I don’t get why a 74 challenger needs it.