67-72 Ford Taillight Fuel Filler — Simple Install Instructions
1967-1972 Ford Truck / 1966-1977 Ford Bronco
Important Notes
- Test-fit before paint, bodywork, powder coat, or final plumbing.
- Flat-back LED taillights are required. Deep factory-style housings can interfere.
- Fuel hose, clamps, and tank venting are not supplied. Use fuel-rated parts only.
- The tank must have its own proper vent. This filler does not vent the tank.
- Disconnect the battery and keep sparks/open flame away from fuel vapours.
Basic Tools
- Drill and bits
- Air saw or body saw
- Small grinder / 3 in. zip disk
- Marker or punch
- Basic hand tools
- Safety glasses and gloves
Install Steps
- Remove the taillight. Remove the taillight from the side being used. Disconnect wiring and clean the taillight pocket.
- Remove the surrounding flange from the taillight opening. Reference the photos below.
- Do not remove the upper flange fully. Just remove the vertical mount with the hole where the factory taillight housing mounts. Reference the photos below.
- Trim the upper inside brace if needed. In the upper corner, there may be a brace from the stake pocket to the bedside. Trim only what is needed so the filler bucket corner sits flat.
- Trim carefully. A 3 in. zip disk on an air line fed up through the bottom of the box works well for the brace area. Finish the remaining cut with an air saw.
- Keep the top tab. The top tab is the only part of the original box panel tab that remains. Use it for the top mount.
- Test-fit the filler bucket. Set the filler bucket into the taillight opening. Do not drill or tighten anything yet.
- Mark and drill the top mount. With the filler sitting flat, transfer the top hole location to the panel. Drill the hole and deburr it.
- Attach the side mounts. Install two shallow screws along the side. Make sure the screws do not hit the filler, hose, wiring, or taillight.
- Install the hinged taillight. Mount the flat-back LED taillight to the hinge plate. Open and close it to confirm it clears and does not bind.
- Route wiring. Leave enough slack for the hinge to move. Protect wires from sharp edges, the hinge, filler neck, and tire.
- Connect fuel hose. Run fuel-rated filler hose from the filler neck to the tank. The fuel neck diameter is 1.5″. Avoid tight bends, high spots, exhaust heat, tires, and sharp edges.
- Vent the tank. Make sure the fuel tank has a proper vent/rollover valve setup. Do not rely on the filler as a vent.
- Final check. Add a small amount of fuel first. Check every connection for leaks, then re-check after the first drive.
Fitment Tip
- Every truck is a little different. Rust repair, replacement bedsides, bodywork, and aftermarket tanks can change the fit.
- Do all trimming and drilling before paint or final finish work.
- Only remove enough material for the filler bucket to sit flat.
Photo Reference
Quick Troubleshooting
| Issue | Check |
|---|---|
| Bucket will not sit flat | Trim the upper brace only as needed. |
| Taillight binds | Loosen hardware and realign the hinge/door. |
| Fuel fills slowly or kicks off | Check hose slope, tight bends, and tank venting. |
| Fuel smell | Check clamps, hose routing, cap, and vent system. |
| Wiring rubs | Add slack, loom, and grommets where needed. |
Final Notes
- Use fuel-rated filler hose and clamps only.
- Re-check hardware, clamps, hose routing, and wiring after the first drive.
- Shop this part: 67-72 Ford Taillight Fuel Filler
For any questions or concerns with your install, don’t hesitate to email us at info@ls-fab.com
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