Symptoms
Holes or soft spots in the floor, bubbling along the rockers, sagging doors that won't latch cleanly, rust around the door-post hinges and water on the floor after rain.
The fix, step by step
- Strip the interior and probe every seam with a pick.
- Brace the door openings before cutting anything structural, then cut back to clean metal.
- Reproduction floor pans come with the grooves and body-mount recesses, and the floor channel support rails underneath are sold separately; replace them if they've gone.
- Fit inner and outer rockers and front door posts as needed, check door gaps before final welding, then seam-seal and coat the new metal.
- If the firewall, inner fenders or frame rails are also rotten, Autotrader and Velocity both warn that the bill can outrun the truck's value.
Tools & part numbers
- MIG welder
- cut-off wheel and spot-weld drill
- door-opening braces and clamps
- seam sealer and weld-through primer
Where to buy the parts
1966–77 Bronco floor pans with grooves and body-mount recess (pair)Bronco Graveyard ↗Amazon ↗
1966–77 Bronco OEM steel rocker panelBronco Graveyard ↗Amazon ↗
1968–77 Bronco left inner rocker panelBronco Graveyard ↗Amazon ↗
1966–77 Bronco front door posts (pair)Bronco Graveyard ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Ford Bronco (1966–1977) parts →
Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.