UPDATED 5/3/16 - Here is today's TTT on yet another old thread - this one details how I made a one-piece stainless steel fuel line for my carb'd engine with a mechanical fuel pump. In this installation, the fuel filter is located up top, between the hard line from the fuel pump just before the carb feed. Original post starts below.....
I know, some of you will throw the red flag on the location of this line, but it runs no closer to the u-joint than the fuel line in my '65 Mustang - and that was without the safety factor of the driveshaft safety loop. Best of all, it allows a clean installation of a one-piece line from tank to pump - using short rubber jumper lines at both ends.
For those thinking about running a fuel line for a mechanical fuel pump, here are some installation photos of mine. It's stainless steel 3/8" line with partial flares (bulges, really) on the ends that I made using a quick-connect flaring tool and only doing about half the flare. The line starts about 8" from where the Breeze feeder tube will exit the tank and proceeds around to above the center-left of the 2" tube at the front of the trunk floor, then it tucks close to the 3/4" tubing while heading down at a 45 degree angle or so to a pair of bends that allow it to parallel the inside of the driver's side 4" round tube, terminating must past the driver's side engine mount support where a short piece of rubber line will connect it to the mechanical pump. I used #10 self-tapping stainless screws to hold the rubber lined clamps in place, with some loctite blue for added measure.
As a side note, yes - it is possible to bend this outside of the car and then fish it all the way into the chassis! I had it in and out quite a few times during the fitting and bending. I did use a soft copper line for the template, though.