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Chassis Engineering

Custom Full Chassis

The most advanced restomod and pro touring 4x4 chassis for classic trucks. Engineered from the ground up. Built in Ponderay, Idaho.

Full Isometric Chassis — Patriot Chassis complete rolling platform showing IFS front suspension, triangulated 4-link rear, and full drivetrain integration
Complete Solution

Engineered From the Ground Up

Our custom full chassis systems are complete rolling platforms engineered for classic 4x4 restomod and pro touring builds. Every component is designed, fabricated, and assembled in our Ponderay, Idaho shop using American-sourced HREW steel and DOM tubing — the same materials used in professional off-road racing chassis.

Each rolling chassis is built to your specifications — tailored to your truck platform, drivetrain choice, and intended use. Whether you're building a show truck, trail rig, pro touring daily driver, or a competition-ready off-road machine, we engineer the foundation to perform. Start with an LS-based engine package and effortlessly switch to a Cummins diesel later — the modular architecture supports it all without re-engineering the frame.

Unlike Mustang II swap kits that bolt IFS to your existing frame, a Patriot Chassis is a complete replacement frame engineered as a unified system. The geometry, structural integrity, and component integration are designed together — not adapted from parts originally made for a different vehicle.

16"IFS Front Travel
15"4-Link Rear Travel
2.5"Coilover Shocks
AAMDifferentials
CNCPrecision Machined
37"Tire Capable
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Front Suspension

Independent Front Suspension

Our IFS delivers 16 inches of usable wheel travel through an Ultra4-inspired uni-ball design built for unmatched performance and durability. The geometry is proven in desert racing and adapted for the demands of classic truck builds.

The independent design allows each wheel to respond to terrain independently, delivering a smoother ride on-road while maintaining extreme articulation off-road. No problems handling 35" or 37" tires.

  • ◆ 16 inches of usable wheel travel
  • ◆ Ultra4-inspired uni-ball design
  • ◆ Upper and lower control arms
  • ◆ AAM/GMC front 9.25" differential
  • ◆ GMC one-ton unit bearings and CV shafts
  • ◆ 35" and 37" tire compatible
Patriot Chassis IFS front suspension detail showing independent geometry and uni-ball design
Patriot Chassis triangulated 4-link rear suspension with equal-length links and coilover shocks
Rear Suspension

Triangulated 4-Link Rear

The full triangulated 4-link rear delivers 15 inches of travel using race-proven geometry. Equal-length upper and lower links minimize roll steer, keeping the rear axle tracking straight through articulation and inspiring driver confidence at any speed.

Coupled with the Patriot Octagon Series long-travel sway bars front and rear, you get the benefits of extreme suspension travel while maintaining a confident, driver-inspiring stance in the corners.

  • ◆ 15 inches of usable wheel travel
  • ◆ Equal-length upper and lower links
  • ◆ Minimized roll steer geometry
  • ◆ Patriot Octagon Series sway bars
  • ◆ Multiple rear differential options
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Drivetrain

Differentials & Drivetrain

The Patriot Chassis platform supports multiple drivetrain configurations. Our architecture is designed so you can start with one powertrain and swap to another without re-engineering the chassis. LS, LT, Cummins — the foundation handles it all.

Choose your rear differential based on your build goals. Every option is fully integrated into the chassis geometry with proper driveshaft angles, brake line routing, and structural support.

AAM11.5" Rear Diff
14BCorporate 14 Bolt
9"Ford Rear End
9.25"AAM/GMC Front
LS/LTEngine Ready
4x4Transfer Case
Patriot Chassis drivetrain integration showing differential, driveshaft, and brake line routing
Patriot Air Shock — 4-inch travel air suspension upgrade for coilover replacement
Shock Options

Coilover Shocks & Patriot Air

Every Patriot Chassis comes standard with 2.5" coilover shocks — tuned for off-road performance. Tuned specifically for our suspension geometry, they deliver predictable damping through the full range of travel.

For builders who want the best of both worlds, upgrade to the Patriot Air Suspension system. It maintains full suspension travel while adding on-the-fly ride height adjustment and serious towing capability — delivering unmatched ride quality whether you're on the highway or the trail.

  • ◆ 2.5" coilover shocks standard
  • ◆ Optional Patriot Air Suspension upgrade
  • ◆ Full travel maintained with air system
  • ◆ On-the-fly ride height adjustment
  • ◆ Towing capability without compromise
Learn About Patriot Air Configure Your Chassis
Modular System

Build at Your Own Pace

Our modular approach means you can build your chassis in stages — like legos for adults. Start with the core frame and add suspension, drivetrain, and accessories on your schedule and budget.

01

Core Frame

The foundation. CNC-cut and welded main rails with crossmembers, body mounts, and core structure. Precision-jigged for exact body alignment. Ready for your components.

  • ◆ CNC laser-cut main rails
  • ◆ Factory body mount locations
  • ◆ Precision jig assembly
02

Suspension

Add the IFS front and 4-link rear suspension packages. Coilovers, upper and lower control arms, uni-ball joints, sway bars — complete suspension geometry engineered for your platform.

  • ◆ IFS front + 4-link rear
  • ◆ 2.5" coilovers included
  • ◆ Octagon sway bars
03

Drivetrain

Your choice of differentials, transfer case mounts, driveshaft provisions, brake lines, and calipers. Full 4x4 drivetrain integration with proper geometry and serviceability built in.

  • ◆ Multiple differential options
  • ◆ Engine + trans mounts
  • ◆ Complete brake system
Platforms

Supported Truck Platforms

We build chassis for the most iconic classic 4x4 trucks in America

47-55 Chevy

Classic AD and Task Force era trucks. Our chassis brings modern IFS front suspension, triangulated 4-link rear, and full drivetrain integration to these iconic first-generation Chevy trucks.

  • ◆ Modern chassis platform
  • ◆ LS/LT engine compatibility
  • ◆ Full 4x4 drivetrain
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58-61 Chevy Apache

The Apache series brought bold styling to Chevy's truck line. Our chassis platform gives these rare trucks the modern foundation they need — IFS, coilovers, disc brakes, and a drivetrain built for real performance.

  • ◆ Apache-specific fitment
  • ◆ Modern suspension geometry
  • ◆ Full 4x4 drivetrain
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67-72 Chevy/GMC C&K Series

The classic square-body platform. Our chassis provides a modern foundation with factory body mount compatibility, giving your Chevy or GMC truck IFS front suspension, 4-link rear, and extreme travel capabilities.

  • ◆ Factory body mount locations
  • ◆ LS/LT engine compatibility
  • ◆ Modern transmission options
  • ◆ Full 4x4 drivetrain
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73-87 Chevy/GMC Trucks

The square-body generation that defined a decade. Our chassis platform provides modern IFS, triangulated 4-link rear, and full drivetrain integration for these rugged and iconic trucks.

  • ◆ Square-body compatible
  • ◆ LS/LT engine compatibility
  • ◆ Modern transmission options
  • ◆ Full 4x4 drivetrain
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K5 Blazer (Independence Series)

The Independence Series was purpose-built for the 1968-72 K5 Blazer. No readily available engineered modern off-road chassis existed for this iconic vehicle — until now. Bolt-on body mounts, extreme travel suspension, and full 4x4 integration.

  • ◆ Purpose-built Independence Series
  • ◆ Bolt-on body mount system
  • ◆ Modular stage configuration
  • ◆ Full convertible top support
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67-73 Ford Trucks

The Bumpside generation Ford F-Series. Our chassis platform delivers modern IFS, coilover suspension, and full 4x4 drivetrain integration for these classic Ford trucks.

  • ◆ Ford Bumpside compatible
  • ◆ Modern suspension geometry
  • ◆ Full 4x4 drivetrain
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73-79 Ford Trucks

The Dentside Ford F-Series — one of Ford's most popular classic truck platforms. Our chassis gives these trucks a modern foundation with IFS front, 4-link rear, and complete drivetrain support.

  • ◆ Ford Dentside compatible
  • ◆ Modern suspension geometry
  • ◆ Full 4x4 drivetrain
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65-77 Ford Bronco

The early Bronco — one of the most sought-after classic 4x4s. Our chassis platform gives these compact off-roaders modern IFS, coilover suspension, and serious off-road capability.

  • ◆ Early Bronco compatible
  • ◆ Extreme travel suspension
  • ◆ Full 4x4 drivetrain
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78-96 Ford Bronco

The full-size Bronco era. Our chassis platform brings modern performance to these iconic full-size 4x4s with IFS front suspension, triangulated 4-link rear, and full drivetrain integration.

  • ◆ Full-size Bronco compatible
  • ◆ Modern suspension geometry
  • ◆ Full 4x4 drivetrain
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Dodge Power Wagon (Type D)

Our Type D platform brings modern performance to the iconic Power Wagon. Complete with floor pans in 14-gauge steel, gauge clusters, transmission tunnels, steering adapters, and all the components needed for a full restoration build.

  • ◆ Type D component line
  • ◆ 14-gauge steel floor pans
  • ◆ Hemi powertrain ready
  • ◆ Full body component catalog
Browse Type D Parts
Patriot Chassis fabrication — CNC precision cutting and jig welding in the Northern Idaho shop
Fabrication

Small Shop. No Compromise.

Patriot Chassis is a small production shop in Ponderay, Idaho with over 40 years of chassis and suspension engineering experience. We specialize in restomod chassis for classic trucks — vehicles from before crumple zones and air bags that deserve a modern foundation. Every frame is built on precision jig tables, every bracket is CNC laser-cut, and every weld is done by hand by our team.

We manufacture a wide variety of DIY and complete components for 47-55 Chevy, 58-61 Apache, 67-72 Chevy/GMC, 73-87 Chevy, K5 Blazer, 67-73 Ford, 73-79 Ford, 65-77 Bronco, 78-96 Bronco, Dodge Power Wagon D-Series, and many more. The same triangulated 4-link rear design is available in both IFS front and traditional solid axle configurations — giving you the flexibility to build a pro touring show truck or a dedicated trail rig from the same platform.

Materials & Specifications

  • ◆ HREW Steel Frame Rails — Hot Rolled Electric Welded steel provides consistent wall thickness and superior weld integrity for main chassis rails
  • ◆ DOM Tubing — Drawn Over Mandrel tubing for suspension links and structural components, delivering precise tolerances and uniform strength
  • ◆ CNC Laser-Cut Components — Every bracket, gusset, and mounting plate is precision-cut in-house for repeatable accuracy
  • ◆ Precision Jig Assembly — Frames are welded on dedicated jig tables that ensure exact body mount alignment and consistent dimensions
  • ◆ Hand-Welded in Idaho — All welding is performed by our in-house fabricators, not outsourced or automated
  • ◆ American-Sourced Steel — All structural materials are domestically sourced for quality and traceability
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Use Cases

Who Builds on a Patriot Chassis?

Our rolling chassis platform serves a wide range of classic truck builders, from weekend hobbyists to professional shops.

Restomod Builders — If you're restoring a 67-72 Chevy C10 or K20 and want modern performance underneath, a Patriot Chassis gives you IFS front suspension, a triangulated 4-link rear, rack-and-pinion steering, and disc brakes — all engineered to bolt to your factory body. No cutting, no adapting, no Mustang II compromises. The result is a classic truck that rides and handles like a modern vehicle while keeping the look that made these trucks icons.

Pro Touring 4x4 Enthusiasts — Pro touring isn't just for muscle cars. Our chassis platform was built for classic 4x4 trucks that need to perform on the highway and on the trail. 16 inches of front wheel travel and 15 inches of rear travel mean your K5 Blazer or Power Wagon can handle high-speed desert terrain, rock crawling, and highway cruising on the same chassis. Add our Patriot Air Shock system for on-the-fly ride height adjustment and you have the most versatile pro touring 4x4 platform available.

Show Truck Builders — For SEMA-quality builds and concours-level restorations, the chassis is the first thing judges see underneath. Patriot Chassis rolling platforms are built with show-quality welds, clean routing, and the kind of attention to detail that wins awards. Our turn-key build program handles everything from chassis to completion — paint, interior, electrical, and final testing.

DIY Builders — Not everyone wants a turn-key build. Our modular component system lets you build in stages. Start with a core frame, add suspension when your budget allows, and install your own drivetrain at your own pace. Every component is designed to integrate seamlessly, so you can build your truck on your schedule without worrying about fitment issues down the road.

Build Your Restomod Chassis

Every pro touring 4x4 project begins with a conversation. Tell us about your truck, your goals, and how you plan to use it — and we'll engineer the perfect rolling chassis package. Not sure where to start? Check our FAQ or give us a call.

Request a Chassis Quote Call (509) 675-7083