What's the difference between 71 Dart and 72 Dart fuel line?

I am ordering new tank-to-pump fuel line for my 71 Dart since I am installing the new gas tank. May as well go 3/8" right?

Question is whats the difference between fuel line on a 71 Dart vs 72 Dart? When I look online they show either fuel line for 69-71 or 72-74

I ask because I am using a 72+ tank for the superior venting system vs the 71 venting system that came with my car

Oh also where are we getting new lines these days? Inline tube? SSTubes, your place for replacement vehicle lines! ?

thanks