When I had a carb in my 66, I ran a new line just outside the frame rail, then at the rear of the floor support beam, it turned and then tied into the existing line by the driveshaft. 

You can purchase new sticks of 5/16" (original size) tubing at an auto parts store. Get an inepensive tubing bender and make a new line.  Use rubber around the line where it goes through the torque box so it cannot vibrate metal to metal.  Use 3/8" a/c line for the rubber grommet.  Lube it up and slide it on the tubing before you flare the ends.

Last edited by MustangSteve (11/24/2013 12:30 PM)

mainiac1 wrote:

Hey Guys, appreciate the replies. Will use the aft end of the one I have inatalled and bend a new one to fit the front 1/2 and tie them together w a 5/16 section of rubber fuel line.

 It would be best to put SAE inverted flare on each end and use a union.  That way you never have to worry about it again.  At the very least, you need to use the first stage of the flare tool to put a bubble on the end of the tubes so the hose will not be rubbing on a bare cut end of tubing. Since you have to do that, why not just flare and install the union.  It will be safer.

I ran 3/8" steel lines many years ago on the fastback.  Unfortunately, the MSD Atomic EFI REQUIRED the use of their high pressure hose on the entire system.  I hate it that I could not install some nice steel lines that would last forever.  Now I can look forward to having to replace a very expensive long hose at some point in the future.

The 69-70 line went through the torque box and then straight over to the rocker panel and then went to the backl of the car along that rail.