The vacuum line diagram for a 1974 super beetle is as follows:
1. The vacuum line from the intake manifold connects to the vacuum advance unit on the distributor.
2. The vacuum line from the vacuum advance unit on the distributor connects to the vacuum port on the carburetor.
3. The vacuum line from the carburetor connects to the vacuum port on the fuel pressure regulator.
4. The vacuum line from the fuel pressure regulator connects to the vacuum port on the brake booster.
5. The vacuum line from the brake booster connects to the vacuum port on the charcoal canister.
6. The vacuum line from the charcoal canister connects to the vacuum port on the air cleaner.
This diagram is for a basic 1974 super beetle. There may be some variations depending on the specific model and year of your vehicle.
