1973-87 C10 Truck SPEC chassis

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SPEC is an engineering focused approach using the latest in manufacturing technology to build the lightest, strongest, and easiest to install complete chassis system. These technologies have been used to streamline procedures resulting in lower cost and shorter lead times. The SPEC IFS is engineered to deliver outstanding performance wrapped up in user friendly package. A completely new proprietary suspension geometry has been designed to provide the best balance of ride quality and performance in its class.

The Benefits:

  • A complete, engineered solution designed with aggressive 4″ ride height that will lay rockers on the ground with the air bag suspension
  • No kinks, bends or stressed areas that are prone to flex like mandrel bent tubing
  • Ability to contour to stock floors for no floor modifications on most applications
  • Stronger, lighter, and more precise.
  • CNC located factory mounts built into the frame for easy, vehicle specific installation
  • Frame rail designs to accommodate mini-tubs and up to 12″ wide wheels
  • No need to work with a weak, twisted 30-50 year old frame
  • No need to cut, c-notch, and step your original frame and worry about keeping everything square
  • Rear frame rail kick up engineered for minimal bed modification while allowing the truck to lay rockers on the ground

SPEC Series Chassis Standard Features:

  • RS exclusive “Laser Rails” precision CNC laser cut and contoured
  • Crossmembers and chassis bracing to contour to factory floors allowing 3″ exhaust
  • Stepped front and rear rails for an aggressive 4.5″ – 5″ ride height
  • Will lay rockers when suspension is fully dropped with 29″ tall tires
  • Vehicle specific cab, bed, bumper, and core support mounts
  • Air bag suspension
  • Power rack & Pinion steering
  • Easy to adjust upper a-arm eccentric mounts for fast and accurate alignments
  • Wilwood Pro Spindle
  • Parallel 4-Bar rear suspension with HD lower arm
  • Air bag suspension
  • Ford 9″ housing with 31 spline axles

Mount Options


Front Suspension Options


Front Disc Brake Options


Brake Line Options


Rear Disc Brake Options


Gearing Options


Shipping Options