Roadster Shop Standard SPEC Chassis - 55-59 GM Truck

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:

  • 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

Standard Features:

RS exclusive “Laser Rails” precision CNC laser cut and contoured
Crossmembers and chassis bracing to allowing for 3″ exhaust
Engine mounts for SBC, BBC, or optional LS & LT
Adjustable, drop out trans mount
Utilizes factory body, bumper, and core support mounts for a true bolt-on installation
Includes new running board mounts
Includes brake pedal assembly
Requires modifications to inner fenders, trans tunnel, and bed floor
RS SV by Fox fixed valve coilovers
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
RS SV by Fox fixed valve coilovers
Ford 9″ housing with 31 spline axles
Rear frame rails will accommodate up to a 345 tire (when mini-tubbed)