fuel lines

[GoMangoBoys]

We bought a stainless fuel line from Fine Lines.  Last week while I was out of town, my son tried to install it.  He struggled to figure out what way to feed it so that it could route correctly.  Any tips???  Also, there are 2 connections to the fuel tank.  I assume that one is a return line.  Does that connect to the fuel line at the engine? 
The car is a 70 Challenger R/T with a 383.

[usraptor]

When you say there are two connections to the fuel tank, I assume you are talking about on the passenger side of the fuel tank, not on the driver's side were the sending unit, etc. is?  Do you have pics of these two connections?  I have a '70 Cuda but I would assume the fuel lines, other than length, probably mount and same or nearly the same.

[anlauto]

If there is two lines on the sending unit, then it's the wrong unit for a 383, but of course it can be made to work with either running a vent line or capping off the one nipple