Haul of Fame: Equipment Express's "Doc Holliday” A 2007 Peterbilt Legacy 379 Built to Legend

Why "Doc Holliday" Earns a Spot in the Haul of Fame

Every now and then, a truck rolls through that stops you dead in your tracks. "Doc Holliday," the custom 2007 Peterbilt Legacy 379 built by Equipment Express out of Caldwell, Texas, is exactly that kind of machine. We're adding this truck to the 4 State Truck’s Haul of Fame for a combination of reasons that are rare to find all in one build: a deeply personal backstory, a flawlessly executed custom theme with old-school looks with modern performance, and the kind of owner passion that only comes from someone who grew up living trucks. This isn't just a show truck, It earns its keep every single day hauling heavy iron across the pipeline country of Texas — and it does it looking like a million bucks.

The Man Behind the Wheel: Truett's Story

To understand Doc Holliday, you must understand the man who built it.

Truett, the owner of Equipment Express, didn't walk into trucking — he was practically born into it. His dad ran a hot oil service company called Hot Oil Plus out in the Texas oilfields. Every afternoon, without fail, the trucks would roll in, and a young Truett was right there waiting for them. "I had to park every one of them." He recalls with a grin. "I had to grease them all. I needed new clothes every day because I had ruined the ones from the day before. — my mom would get very aggravated”.

His uncle drove long haul, running the west coast shuffle with produce. Every Christmas break Truett rode shotgun all the way to California. But the story that really tells you everything you need to know? One Christmas, his uncle got sick out in California. Truett was in the third grade and needed to get back home for school. His uncle looked at him and said — “You've been driving them in the yard; it's your turn to get on the road”. So, a third grader drove a truck from California to Fort Stockton, Texas.

"My parents picked me up and they were like, “I cannot believe your uncle let you drive that truck,'" Truett laughs. "From then on, it's been nothing but trucks for me."

That foundation — built on grease-stained clothes, miles of asphalt, and an unbreakable love for the trade — is exactly what you're looking at when you stand in front of Doc Holliday.

What Equipment Express Does

Fast-forward to today, and Equipment Express is a respected heavy hauler based in Caldwell, Texas, specializing in what Truett calls "yellow iron" — construction equipment, primarily serving the pipeline industry. Side booms, excavators, dozers — those account for roughly 70% of their fleet's work. It's demanding, punishing duty that requires trucks built to perform, not just to impress.

And yet, somehow, Truett manages to build trucks that do both.

Meet Doc Holliday: The Build

The name says it all. Themed around the 1993 cult classic Tombstone, this truck is loaded stem to stern with references to the film's most iconic character — the razor-tongued, ivory-handled gunfighter played by Val Kilmer. From the moment you lay eyes on it, the quotes and the imagery just keep coming. "I'm your huckleberry." "I have two guns — one for each of you." "Well... bye." You'll find them painted, engraved, and emblazoned across the truck in ways that feel intentional and cohesive rather than gimmicky.

But let's talk about what's underneath the paint, because that's where the real story lives.

The Foundation: Legacy 379 #736

Doc Holliday is built on a 2007 Peterbilt Legacy 379 — serial number 736 of 1,000. The Legacy Series was a limited-anniversary edition released in the final year of the iconic 379 model, and Truett is unabashedly passionate about them. "07 is my favorite year," he says. "Most of my fleet are 07s — I've got about 18 of them. 07 is the last year of the 379, so that's the reason I like them."

When this truck came to Truett, it was stripped down to bare frame rails. Those original rails were kept — the serial number is still stamped right in — but everything else was torn down and rebuilt from scratch.

The Running Gear: Old Truck, New Everything Else

This is where the build gets serious. Truett didn't just repaint an old truck. He essentially built a new one around those original rails:

• Front axle: 389 factory air ride
• Rear axles: 389 factory air ride Super 40s (46,000-lb. rated axles on 40,000-lb. suspension)
• Brakes: Disc brakes front to back — just like a brand-new truck
• Transmission: Eaton Fuller 2918 paired with a 1750 four-speed auxiliary
• Gearing: 4.11 direct gears with two lower ratios in the auxiliary and one overdrive

In short, you've got a classic-looking 1980s-era truck sitting on 2020s-era running gear. The ride quality, the stopping power, the drivetrain robustness — all of it is current-generation. Only the frame rails remember what year it is.

The Heart: The C-17 Caterpillar

Here's where things get really interesting. When Truett lifted the hood and said "C-17 Cat," it raised an eyebrow. There's no such thing as a factory C-17 — but that's precisely the point.

What Truett's team built is a modified C-15 that earns the C-17 designation through displacement. The process involves installing the pistons and liners from a C-18 into the C-15 block and modifying the connecting rods to match the existing C-15 crankshaft. Add a custom ECM tune on top of that, and you've got something that doesn't quite exist on any factory spec sheet. Best estimate? Around 800 horsepower. Paired with those low gearing options and that auxiliary transmission, Doc Holliday can pull whatever you put behind it.

Under the hood, the attention to detail continues — painted intake pipes, chromed coolant lines, polished and plated where it counts. Even the engine bay is themed, with Tombstone references painted on the pan: "Law don't go around here" next to a six-shooter, and "I have two guns, one for each of you" greeting you from below.

Sheet Metal & Custom Bodywork

Walking around Doc Holliday is a study in how custom bodywork should be done. Every weld is ground smooth. Every panel is body-worked to perfection. The attention to symmetry and alignment is obsessive in the best way.

WTI Fenders

One of the standout details on the rear end is the set of WTI single-hump full-radius fenders — the kind that look effortlessly clean when done right but are notoriously difficult to mount correctly. Truett estimates the team put close to 40 hours of labor into laying out, mocking up, mounting, and leveling those fenders. "You see more trucks with them not mounted just right than you do right," he says, and he's not wrong. On Doc Holliday, they're perfect — same height at the top, same height at the bottom, left to right, front to back.

4 State Trucks carries WTI fenders — if you're looking to achieve the same clean, classic look on your build, these are the fenders to spec. Talk to our team about getting them mounted right the first time.

Stainless Steel Visors

The stainless steel visors are another standout detail on this build finished to the same standard as everything else on Doc Holliday: clean, symmetrical, and built to last. Like everything else on this truck, they weren't an afterthought. They were spec'd to complement the overall look and executed with the same precision you'll find on every panel, weld, and bracket from front to back.

Deck Plate & Fab Work

All the deck plates are fully enclosed — a signature Equipment Express touch that keeps the underside clean and visual clutter to a minimum. The rear stiff arm that supports the trailer neck when detached is fabricated from three-quarter inch plate steel, fully molded and integrated into the frame structure. Custom T-bar on the back. Custom top hatch covers on the lug nuts. Every detail serves double duty — functional and finished.

The Sleeper: Double Eagle Nostalgia, Done Right

The cab features a Double Eagle sleeper — pulled off what Truett believes was an early-'80s truck — fully re-skinned with all-new exterior panels and a completely redone interior. Truett tracked down leftover OEM Double Eagle parts from when the company went under, so the authenticity is real.

The small bow tie chrome trim on the corners seals the deal. It shouts 1980s custom truck, loudly and proudly, without going so far that it starts to look like a 359. That balance — new amenities wrapped in old-school cool — is the whole philosophy of Equipment Express's builds.

The Tombstone Touches

Rather than generic chrome and lighting choices, Truett made every decision theme-first. The tanker-style cab lights? They're flat-brimmed — like Doc Holliday's top hat. The eight-inch straight pipes run old-school turnout cuts rather than the miter cuts you'll find on most of the Equipment Express fleet — a small but deliberate change that ties back to the era the truck is channeling and the character it's named after.

The boomerang antenna — actually the very first piece Truett purchased for this build — came from an old truck stop, the kind where you have to dig through the top shelf to find the good stuff. He tracked down the matching side "van windows" from a square-body '70s van in a junkyard. Neither detail was an afterthought; the antenna was day one of the vision.

None of these details happened by accident.

The Interior: Diamond Tuck & Blue Light

Step inside Doc Holliday and you're greeted with a cohesive, finished-out cab that manages to feel both period-correct and brand new. Every surface, every detail, every label has been thought through — and it shows.

Blue-Tinted Windows

The first thing you notice before you even open the door is the windshield. That deep blue tint isn't smoke — it's blue, intentional, and unapologetic. It ties the exterior color scheme directly into the cab experience and sets the tone for everything inside. Bold choice. Stunning execution.

The Dashboard

The dash is clean, painted to match, and trimmed out in chrome where it counts. The Equipment Express oval sits in stainless steel right where the Peterbilt badge would normally live — a subtle but meaningful touch that makes it clear whose truck this is. The hat logo from the exterior theme carries through here as well, keeping the Tombstone thread running all the way to the driver's eye line.

Foot Pedals

Even the foot pedals got the treatment. Nothing on this truck was left stock just because it was easy to overlook. If you could see it, it was finished.

"Doc" and "Holliday" Custom Gear Shifters

The 18-speed with the four-speed auxiliary isn't just dressed out in chrome surrounds — the shifters themselves are labeled "Doc" and "Holliday." It's the kind of detail that makes you smile the first time you see it and never gets old. Every gear change is a nod to the build's identity.

"Wagon" and "Mule" Custom Gear Shifters

The theme doesn't stop at the transmission shifters. The air valves for the truck and trailer are labeled "Wagon" and "Mule" — fully in character with the Tombstone world Truett built around this rig. Every label, every piece of hardware, every tactile surface tells the same story.

The Detail on the Windshield

If you look closely at the windshield, you'll find one more Tombstone wink hiding in plain sight: "I'll be damned!! You may indeed if you get lucky" — a line delivered with the same dry wit that made Doc Holliday one of the most quotable characters in Western film history. It's the finishing touch on a cab that rewards the people who look closely.

Diamond Tuck Throughout — Ceiling, Door Panels & Sleeper

The diamond tuck upholstery is one of the most visually striking elements of the interior, and it doesn't stop at the seats. The tufting runs across the ceiling, wraps the door panels, and carries all the way back into the sleeper cab — same two-tone blue inside that you see on the outside of the truck. It's cohesive, it's period-correct, and it elevates the entire cab from a working interior to something closer to a custom coach.

Blue Lighting in the Sleeper

When the sun goes down, the sleeper takes on a whole new personality. Blue LED lighting illuminates the bunk area and glows through the side windows of the sleeper cab — carrying the truck's signature color into the night and giving Doc Holliday a presence on the road after dark that is as distinctive as it is during the day.

The Horn — The Real Deal

Don't let anyone tell you air horns are just noise. The locomotive horn on Doc Holliday is the genuine article — not the three-bell, ninety-dollar made-in-China version you find on most trucks. This one came from Truett's own collection, complete with an authentic valve to match. When this thing sounds off, you know it. It's the right note to end the interior tour on — because just like everything else on this truck, it's not a substitute. It's the real thing.

4 State Trucks Product Highlights on This Build

For those looking to source the same gear that went into Doc Holliday, here's what we can help you with:

• WTI Single-Hump Full-Radius Fenders — as featured on the rear of this build. A signature look that takes serious time and skill to mount correctly.
• Chrome & Polish Components — coolant lines, air cleaner covers, tanks, and trim pieces throughout this truck reflect the kind of chrome shop work our team lives for.

If you're inspired by this build and looking to replicate any element of it — fender mounting, chrome installs, custom fabrication — our Install Shop (managed by Michael Forst) and the Chrome Shop Mafia Fab Shop (run by Cody and the crew) are ready to help you take your truck to the next level.

Advice from the Man Who Built It

Before wrapping up at the truck, Truett offered some hard-earned advice for the next generation of heavy haulers just getting started:

"Customer service and quality. Price don’t mean nothing. You can be the cheapest guy in town and they ain't going to use you very long if you don't have customer service. Or you can be the highest guy in town and they only have to use you once to get in there if you got the customer service to take care of your customers."

"Do what you say you're going to do. If it costs you money, it costs you money — you can't go back on your word. You learn from your mistakes, and you go about it that way."

It's the kind of advice that applies just as much to a chrome shop as it does to a heavy haul company. Truett still counts his very first customer from when Equipment Express opened as his number one customer today. That's not an accident. That's a philosophy that’s lived out on every mile, every job, and every truck.

What's Next: Keep an Eye Out for "Troublemaker"

Before he let us leave, Truett teased the next build coming out of the Equipment Express shop — a truck called Troublemaker. It's not blue. Well... he clarified: "It's a shade of blue, but it's not blue." We're not quite sure what that means but given what this team just pulled off with Doc Holliday, we're already looking forward to finding out.

Why This Truck Belongs in the Haul of Fame

Doc Holliday earns its place in the 4 State Trucks Haul of Fame the same way the real Doc Holliday earned his reputation — through a combination of style, substance, and the willingness to go further than anyone expected.

This isn't a truck built for trophies. It's a working heavy hauler that pulls pipeline equipment across Texas every week, powered by a one-of-a-kind 800-horsepower engine that doesn't exist on any factory spec sheet, rolling on disc brakes and air ride axles wrapped in flawless custom sheet metal and a theme executed so thoroughly that even the cab lights reference a movie character's hat brim.

Truett and the Equipment Express team represent exactly what this segment is about — people who love trucks deeply, build them right, and run them hard. The fact that their fleet looks this good while doing it is a testament to a standard of craftsmanship and pride that is increasingly rare.

Doc Holliday, you are officially in the Haul of Fame!

Ready to Build Something Worth Remembering?

If Doc Holliday has you thinking about your next build — or your first custom truck — the 4 State Trucks team is here to help you get there. Whether it's sourcing the right parts, planning a fender installation, or tackling a full custom fabrication project, our Install Shop and Chrome Shop Mafia Fab Shop bring the same level of attention and craftsmanship to every project that walks through the door.

Visit our We Know Trucks page to learn more about what we can do for you, or give us a call at 877-914-8886 ext. 148 to talk through your project.

Because every truck has a story. Let's make yours one worth telling.

The 4 State Trucks Haul of Fame celebrates the operators, owner-operators, and fleet owners who represent the highest standards of craftsmanship, dedication, and passion in the trucking industry.