This 1973 Chevy Crew Cab Is A Cummins 12-Valve Diesel Survival Rig

Forget complicated electronics and fragile systems. This 1973 Chevy Crew Cab is built around one core idea: diesel-powered reliability. At the heart of it all is a legendary 12-valve Cummins, and everything else on the truck supports that mission.

Kanan Gubins didn’t just build another squarebody. He engineered a machine that’s designed to keep moving when everything else stops. As he puts it, the goal was clear: a mechanically simple, EMP-resistant diesel workhorse with real-world usability and long-range capability.

Cummins Power With Old-School Simplicity

This truck didn’t start life as a 4×4. It began as a two-wheel-drive dually, but the real draw was already under the hood: a 12-valve Cummins pulled from a 1993 Dodge. That inline-six is known for its durability, minimal electronics, and ability to run in harsh conditions, making it the backbone of this build.

The engine is fed by a Ratman Performance VE pump, keeping things fully mechanical and easy to service. Supporting hardware includes a Rob Bonney Fabrication crossmember and mounts, while a big-block Chevy radiator and fan shroud handle cooling duties. Trackspec Motorsports hood louvers help evacuate heat, and a custom 4-inch exhaust with a Black Widow Big D muffler gives the truck a proper diesel bark.

New Wiring, A Quartet Of Batteries, And More

The wiring Kanan inherited in the truck was beyond saving, so it was completely rewired using Painless Wiring components. Power comes from four Odyssey batteries, ensuring consistent electrical supply even in extended off-grid situations.

The drivetrain stays true to the truck’s no-nonsense philosophy. A Getrag 360 five-speed manual and South Bend Clutch sit behind the Cummins, paired with a divorced NP205 transfer case. 

One-Ton Running Gear, Diesel-Tough

To match the engine’s capability, the truck rides on beefy hardware. Up front is a kingpin Dana 60 with an Eaton Truetrac, upgraded with modern GM 2500HD disc brakes and a WFO Concepts crossover steering setup.

Out back, an AAM 11.5-inch full-floater from a Duramax truck brings additional strength, also equipped with a Truetrac. Both axles run 3.73 gears and Yukon Gear & Axle covers, and are fed by Drivelines Inc. ‘shafts.

Lifted, And Rolling On 37s

The suspension setup is straightforward. Six-inch Rough Country leaf springs and V2 shocks are up front while the rear leaf-spring suspension has lift blocks, Rough Country air bags, and matching shocks. It clears 37-inch Interco Manchester InterForce M/T tires mounted on Black Rhino Alpha wheels finished in blue to match the truck’s paint.

Utility Meets Overland Function

Instead of a traditional bed, Kanan sourced a utility body from a salvage yard, adding real-world functionality. The truck was refinished by Mid Valley Auto Body, while the bed, lower body, and frame were coated with Rhino Liner for durability.

The truck is outfitted with a Rough Country rooftop tent, 240-degree awning, front and rear winches, and dual air compressors. There’s also a custom Iron Bull front bumper. 

Diesel Survival Mindset

The build goes deep into reliable function. EMP Shield components add another layer of protection, while features like a power inverter, Rough Country refrigerator, and secure utility storage with Thunderbolt Locks make it a fully self-contained platform. Additionally, BuiltRight Industries mounting systems products are used throughout.

Inside, the custom interior by Auto Upholstery by AJ blends comfort with function, and there’s a Forever Sharp steering wheel, but nothing distracts from the truck’s core purpose. This is still a diesel-first machine.

Analog Muscle In A Digital World

In an era of tech heavy builds, the truck, dubbed “Stigarado – EMP Edition,” is less sensors and screens and more mechanical durability, with proven diesel power. It’s built around one of the most respected diesel ‘plants ever made.