Replacing the original early Bronco bench or low-back buckets with proper seats is a genuine comfort and control upgrade — you stop sliding around on the trail and your back stops hating you on the highway. But if you add a multi-point harness, you must mount it correctly: a harness bolted at the wrong angle is more dangerous than the factory lap-and-shoulder belt it replaces.
The original early Bronco seats are flat, unsupportive, and let you slide off-camber so you're fighting the wheel to stay planted. Modern suspension seats or fixed-back buckets hold you in place, add lumbar support for the highway, and make technical trail driving far less tiring. This is one of the higher-impact comfort upgrades for an EB that gets used.
The honest part: seats themselves are a straightforward bolt-in with the right brackets. Harnesses are where people get hurt by good intentions. A 4- or 5-point harness needs correct geometry — shoulder belts pulling at the right downward angle to an anchor at shoulder height, mounted to structure that can take crash loads. Done wrong, a harness can cause spinal compression in a rollover. If you're not adding a cage or harness bar, keep the 3-point belts and upgrade the seat alone.
EB-specific seat brackets (Wild Horses, Toms Bronco) bolt the new seats to the original floor mounting points without fabrication. Choose seats sized to the EB's narrow tub — full-size truck seats often won't fit between the wheel wells. For harnesses, you need a harness bar or cage with anchor points at the right height; a 4-point harness anchored to the floor at the wrong angle is the configuration to avoid.
Bolt the seat brackets to the original floor mounts, verifying clearance to the shifter, door, and wheel well at full travel of the slider. Mount the seats and torque the bracket bolts. For harnesses, the shoulder belts must run from your shoulders rearward and slightly down (no more than ~20° below horizontal) to an anchor at or slightly below shoulder height — that's why you need a harness bar, not a floor anchor behind the seat. The lap belt anchors low at the hips, pulling at roughly 45° back. Tie harness-bar tabs into the cage or weld a proper bar to structure, not to sheet metal.
Verify the slider's full range doesn't let the seat foul the shifter or trap a foot, and that you can still reach the pedals and exit the door.
The dangerous mistake is mounting shoulder-harness anchors below the shoulders — pulling up and back from a low floor anchor compresses the spine in a frontal impact. The anchor must be at shoulder height. If you can't mount it there, keep the factory 3-point belt.
Don't anchor harnesses to sheet metal or thin brackets. Crash loads will rip them out. Anchor to the cage, a welded harness bar, or reinforced structure.
Check seat width before buying — the EB tub is narrow and many popular seats won't clear the wheel wells or will block the door.
Keep the factory 3-point belts if the truck is a daily driver without a cage. A 3-point belt is engineered to work without a harness bar; a 4-point isn't a casual upgrade.
EB seat brackets run $180–260 a pair. Seats span a wide range: budget fixed-back buckets $300–500/pair, mid-tier suspension seats (PRP, Corbeau) $600–1,000, premium $1,200+. Harnesses are $80–130 each plus a harness bar or tabs ($90–250). A practical seat-and-bracket upgrade lands around $400–700; add harnesses and a bar and it's $900–1,800. Toms Bronco and Wild Horses sell EB-fit brackets — buy brackets cut for the Bronco floor rather than universal rails to avoid fitment fights.
| Part | Vendor | Est. price |
|---|---|---|
| Suspension or fixed-back seats (pair) | PRP / Corbeau | ~$700 |
| EB-specific seat brackets/sliders (pair) | Wild Horses / Toms Bronco | ~$220 |
| 4-point harnesses (pair) | Crow / PRP | ~$200 |
| Harness bar or cage tie-in tab kit | Various | ~$90 |
Written and maintained by an AZ wheeler and driveway wrencher. Always cross-reference your factory service manual — modifications affect vehicle safety and warranty. Work at your own risk.