Fuel line question

[Ziggy1621]

Ok, so I'm getting ready to put the new fuel pump in my build and decided I would blow out the fuel lines while they're open. There are two hard lines that terminate near the firewall (one goes into the fuel filter) and then there is the long one that goes up to the front, has a rubber hose, then goes back to a hard line and enters into the "Fuel Tank" section of the carbon canister (I have done the carbon delete btw, so have that line under the fender well going to the bottom hard line as described here http://s95014253.onlinehome.us/mediac/4 ... ypass3.jpg)

So... I pulled the rubber hose and attempted to blow air in that hard line in the direction going backwards to the fuel tank, and its a no go. I'm guessing that is not supposed to be like that. Any suggestions? I'll prob jump under the car and see if the previous owner possibly crimped it somehow as the car was pretty low. I'm guessing it goes to the rear, left hand connection on the fuel pump. I couldn't find a good diagram of the fuel lines. But the one on the right side goes into the tank, the front left goes up to the fuel filter, then I don't know what the rear, left one is for (the culprit above). Any suggestions appreciated.

[Ziggy1621]

Somebody?