Text and photos by Ken Daugherty
My method eliminates the floppy rubber hoses, ugly clamps and twist ties I often see with Weber carburetor installations.
I use NAPA steel tubing, pn 813-1235 (5/16" x 60"), forming one piece to fit behind and up under the lip on the fan housing (photos #1, #2, #3 below). I braze it in place. Note how the ends are positioned so the rubber hose will follow neatly around to the carburetor fittings.
If you don't want to braze the tube to the fan housing, you can fabricate clips, braze the clips to the tubing and then mount the clips to the fan housing with pop rivets. The photos below show the brazed crossover installation.
Next I fabricate a new line from the fuel pump to the carburetor fitting (photo #4).
On the driver side carburetor you will need to add an extra 'fuel inlet pipe' from Pierce Manifolds, pn 10525.023, phone (408) 842-6673 (photo #5).
The fuel hose I use is the common cloth wrapped 356 hose available from our vendors or from your local VW parts house. Ask for Type III fuel injection hose. I am now adding heat shrink to the transition between rubber hoses and the steel line. It adds a finished look (photo #6).
The finished work is shown in photo #7. A plus to my method is that you do not need to cut up your original fuel lines. Pack them away with your original carburetors and air cleaners. The next caretaker may want them. [Ed: also see David Jone's article on Making Your Own Fuel Lines.]