How WFO Concepts Builds the Ultimate Trail-Ready Chevy OBS Truck

When James rolled his 1993 GMC 1500 Z71 into the WFO Concepts shop, he had one goal in mind - transform his OBS truck into a trail-crushing machine that could still handle daily driving duties. What rolled out of their bay was nothing short of spectacular, and it’s exactly why WFO Concepts has become the go-to shop for serious solid axle swaps.

The team at WFO didn’t just slap some parts together and call it good. They engineered a complete 6-inch SAS kit that takes advantage of the bulletproof 2005+ Super Duty Dana 60 front axle. This isn’t your buddy’s backyard hack job - this is precision engineering that maintains the truck’s road manners while giving it serious off-road capability.

The heart of this build starts with that Super Duty Dana 60 housing up front, loaded with 4.88 gears and an ARB air locker. Out back, they kept things simple but effective with a factory disc brake 14-bolt rear end. The whole package sits on 37-inch Toyo Open Country MTs, which is the sweet spot for this type of build - big enough to crawl over anything but not so massive that you need a ladder to get in.

What really sets this build apart is the suspension setup. WFO went with 10-inch travel Fox 2.5-inch coilovers up front, paired with their custom radius arm setup. The common misconception about radius arms is that they don’t flex well, but watching this truck articulate proves that theory dead wrong. The calculated amount of bind in the radius arms actually helps the truck handle better on the street while still allowing impressive flex when the terrain gets gnarly.

The engineering details are what separate WFO from the pack. Their heavy-duty frame plates and shock towers bolt right in without requiring major fabrication work. The cross member is a thing of beauty - clean, strong, and designed to make installation straightforward for shops that know what they’re doing. They topped it off with a 1350 CV driveline that can handle the power and torque without breaking a sweat.

One of the smartest moves WFO made was including a Fox dual steering stabilizer setup. With 37s and a solid front axle, you need all the help you can get to keep the steering wheel from trying to rip your arms off when you hit a rock or root. The dual stabilizers keep everything smooth and controlled, whether you’re threading through tight trees or bombing down a fire road.

The attention to detail shows in how they handled the little things too. The e-brake cables got the universal treatment to work with the newer axle, and the brake setup functions flawlessly. When it came time to stuff those 37s under the factory fenders, they didn’t just hack away with a sawzall. The fender trimming was surgical - removing just enough material to clear the tires while maintaining the truck’s clean lines.

What really impressed the WFO crew was how well this thing flexes. With the truck completely twisted up in their test, you can see the rear shackles nearly lined up perfectly with the leaf springs - exactly what you want when maximum droop is the goal. The front end articulates beautifully, with those Fox coilovers soaking up everything while the radius arms keep the axle positioned exactly where it needs to be.

The test drive results speak for themselves. The truck maintains excellent road manners despite the aggressive modifications. The steering is tight and responsive, and the ride quality stays comfortable thanks to those quality Fox shocks. This is the kind of build that proves you don’t have to choose between trail capability and daily drivability when you do things right.

WFO Concepts has dialed in this Super Duty swap kit through countless builds and real-world testing. They understand that OBS truck owners want something that looks period-correct but performs with modern capability. This 6-inch kit hits that sweet spot perfectly, giving you the clearance and strength you need without making the truck look like a cartoon.

The beauty of working with WFO is their complete approach. They’re not just selling you parts - they’re providing a complete solution that’s been tested and refined. Their website at wfoconcepts.com shows off more builds like this one, and their social media presence on Facebook, Instagram, and TikTok keeps you updated on their latest projects.

For anyone considering a solid axle swap on their OBS truck, this build shows what’s possible when you work with a shop that understands both the technical requirements and the end-user experience. James ended up with a truck that can handle serious trail work while still being comfortable enough for daily duties. That’s the WFO Concepts difference - they build trucks that actually get used, not just shown off.

The combination of that Super Duty Dana 60, quality Fox suspension components, and WFO’s proven engineering makes this one of the cleanest OBS builds we’ve seen. It’s got the capability to tackle serious terrain while maintaining the classic OBS aesthetic that makes these trucks so desirable. When you’re ready to take your OBS to the next level, WFO Concepts has the kit and the knowledge to make it happen right.