On one of my visits to the archives of the University of Alabama at Huntsville I found the following drawing of the Saturn V S-IC (first stage):

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Scan and cleanup by heroicrelics.

The Saturn S-IC Booster

Schematic drawing shows the location of the tubular, coaxial missile fuel line (LOX suction line), which will be the first structure to be produced by the Par-Form process.

Major Components

1. Forward Skirt Structure
2. GOX Distributor
3. LOX Tank
4. Anti-Slosh Baffles
5. Anti-Vortex Device
6. Cruciform Baffle
7. Intertank Structure
8. Fuel Tank
9. Suction Line Tunnels
10. LOX Suction Lines

11. Fuel Suction Lines
12. Center Engine Support
13. Thrust Column
14. Hold Down Post
15. Upper Thrust Ring
16. Lower Thrust Ring
17. Engine Fairing
18. Fin
19. F-1 Engine
20. Retro Rockets

21. GOX Line
22. Helium Line
23. Helium Bottles
24. LOX Vent Line
25. Helium Distributor
26. Instrumentation Panels
27. Cable Tunnel
28. Umbilical Panel

See NASA photo MSFC-75-SA-4105-2C for similar S-IC diagram.