My guess would be the O2 sensor or a vacuum leak. You might be able to find the vacuum diagram at
www.redpepperracing.com.
The return line is not under high pressure, you can fix it by cutting out the damaged area and splicing in a rubber fuel line. For the supply line you could cut out the damaged area, flare the ends, then splice in a piece of steel tubing. A rubber hose will probably work for the supply side too, but I don't want to suggest something that may not work.
Welcome to the AF!