Front fuel lines

[ck1]

Hi all been awhile, so my 68 charger carburetor was changed to a Carter AFB and going back to a Carter AVS and trying to order front fuel lines but in the mopar catalog they have two different part numbers, one for single line and the other is two lines, 67 to 72 is one line and 68 to 71 is two lines? It's a 383 4bll car 727 trans 5/16 fuel line.

[ck1]

Never mind I found it, it's two line, found my old fuel line in the closet, it has a fuel filter in between