I have some SS fuel lines that I made and test fitted upon my '74 914. I modeled them after the stock plastic lines. The tubing is 304SS and the wall thickness is .028
install video (sorry engine is out of car for this one)
YouTube - Fuel Line install
These fuel lines can be installed with the engine in the car. Fuel lines are available in 9.5mm and 8mm
$35 each, $14 shipping
$60 set of any 2, $16 shipping
PM me if interested
-Robert