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Product Summary

47-54 GMC, 47-54 Chevy, IFS Front Suspension Type

  • Completely bolt in cross member with front suspension, brake, and steering kit for 1947-54 Chevy 1/2 and 3/4 ton trucks
  • Heat treated forged steel spindles that retain stock factory geometry
  • Standard Tubular Upper and Lower Strutless Control Arms are made from full .120 wall, 1" diameter tubing, fixture welded with screw-in ball joints and no-squeak rubber bushings
  • Coil-over spring and shock assembly is fully adjustable using included aluminum spanner nut for ride height adjustment
  • Includes bolt in interlocking frame boxing plates for strength

Comes as a Kit

Key Specs

BrandSpeedway Motors
Front Suspension TypeIFS
Control Arm StyleTubular
Spring TypeCoilover

Need To Know

Quick and Easy Returns

Return Policy

Details

As featured on our 1952 Chevy Pickup for Classic Truck’s Week to Wicked. Watch the transformation here!

Spindles

  • Heat treated forged steel spindle that retains stock factory geometry
  • Direct replacement for 1974-1980 Pinto/Bobcat and 1974-1978 Mustang II
  • Uses all stock rotors, bearings, calipers, etc
  • Stock height

 

Coilover Shocks with Springs

  • For unmatched ride quality for the street and strip, turn to QA1’s Mustang II Coil-Over Shocks
  • Stock appearance
  • Steel Body
  • Simple bolt-in installation
  • Coil-Over Capable
  • Adjustable ride height
  • Mount is Stock 7/16" I.D. Bolt Hole, Bushing
  • Chrome silicon spring material
  • 8 1/8" free length
  • Polished & chrome plated finish
  • Choose your desired spring rate

 

Calipers

  • Stock replacement single piston Metric calipers
  • Standard equipment on 1978-88 GM mid-size cars (Cutlass, Grand Prix, Regals, Monte Carlo, etc.)
  • Feature a 2.375" single piston, shielded bottom inlet
  • Will save 3-1/2 lbs. per side compared to mid-size 1969-1977 caliper
  • No core charge required
  • 7/16"-20 inlet
  • 5-1/2" Mount Spacing
  • Utilizes GM metric style D154 brake pads

 

Brake Pads

  • Speedway soft brake pad for GM Metric 1978-Up

Tech Tip:  Only use full metallic pads on coated rotors.

Learn how to properly Bed-In your brake pads by reading our tech article.  Bedding-In Brake Pad Procedure.

 

Rotors

  • Vented stock 11" diameter brake rotors for 1974-1980 Mustang II, Pinto, or Bobcat spindles (or popular GM Metric calipers and brackets)
  • Brake rotors are new, not plugged or re-drilled
  • Has a 5 on 4-3/4" bolt pattern with corresponding 7/16" diameter fine thread wheel studs
  • 5 on 4.75" Bolt circle
  • Granada type rotor

 

Control Arms

  • Stock Width
  • For Coil-Over Shock
  • Upgrade to a cleaner looking control arm
  • Full .120" wall, 1" diameter fixture welding tubing
  • Features screw-in ball joints and no-squeak bushings
  • Works with nearly any stock or aftermarket crossmember
  • Welding may be required on some applications
  • Designed to correspond with coil-over style springs and shocks
  • Works with Mustang II crossmembers that come without lower A-Arm tabs
  • Non-strut rod applications

 

Crossmember

Our bolt-in Mustang II suspension kit for 1947-1954 Chevy half-ton and 3/4 ton pickups includes all hardware and instructions. 

  • Completely bolt in - no welding required
  • Based on proven Mustang II geometry
  • Complete with bolt in boxing plates to reinforce the frame
  • Interlocking design for ultimate strength
  • Threaded adjusters to fine tune ride height
  • Full lower A-arms required with this crossmember (strutless type)
  • Requires the use of a power rack and pinion and tubular control arms
  • NOT for use with air ride

Parts List (PDF)

Note:  Use bolt-in motor mount kit 910-54754 to mount your S/B Chevy.

 

Sway Bar

  • For 1947-54 Chevy pickups
  • Includes urethane mount and end-link bushings
  • For use with tubular arms that include end link mounting tabs
  • Hardware included
  • Used in conjunction with standard width lower control arms

 

Steering Rack

  • Fits aftermarket Mustang II crossmembers
  • Available in manual or power steering
  • Mount bushings are included with the Power version, but mount bushings are NOT included in the Manual version

MANUAL: 

  • New manual rack and pinion steering assembly for Pinto/Bobcat/Mustang II based front suspensions in street rods and kit cars
  • 9/16"-26 spline input shaft
  • 16" mount centers
  • We suggest the Sweet brand u-joint 910-3247 or 910-3227
  • The Unisteer U-joint tends to run big on this joint
  • Features 14mmx1.5 thread for inner rack extensions, # 910-34345-MAN suggested

POWER: 

  • New power rack modeled from the 1982-88 T-bird design which will work with aftermarket Mustang II crossmembers
  • Bushings included
  • (Can be used with a Saginaw GM power steering pump without any additional valves or inline pressure regulators)
  • Overall width is 45-1/8" with 15-1/2" mount centers
  • Must use offset bushings (910-34342) to mount to original Mustang II crossmembers
  • 3/4"-36 spline input shaft
  • Uses 910-4047 -6AN adapter fittings
  • Rack has 9/16"-18 female o-ring high pressure inlet and 5/8"-18 female o-ring low pressure outlet return line threaded ports
  • Replacement sku for rack and pinion hard lines is 910-35344

 

Tie Rods

  • Outer tie rod and inner extension fits left or right, attaches steering rack to spindle
  • Fits both manual Mustang II and 1982-1988 T-Bird power racks
  • Replacement boot available as # 910-913101
  • Cast steel construction for strength
  • Grease zerk for service as needed
  • 9/16"-18 R/H female thread
  • 3.40" long from stud centerline to end
  • All new hardware for a complete install

 

Kit Includes:

  • (1) Heidts SB-054 Mustang II Stabilizer Sway Bar Kit
  • (1) Bolt-In 1947-54 Chevy Pickup Mustang II Crossmember
  • (1) Set of Standard Tubular Control Arms
  • (1) Set of Coilover Shocks with Springs
  • (1) Pair of Stock Spindles
  • (1) Mustang II Coil Spring Ride Height Adjuster Kit
  • (1) Mustang II Power or Manual Rack & Pinion
  • (1) GM Metric 11 Inch Disc Brake Kit

Charts

Guides & Documents

Specifications

KEY SPECS
BrandSpeedway Motors
Front Suspension TypeIFS
Control Arm StyleTubular
Spring TypeCoilover
GENERAL
Suspension Height AdjustmentStock Height
Shock TypeMono Tube
FinishNatural
Rotor Diameter11 Inch
Spindle StyleFord Stock
Dropped SpindlesNo
Dropped AxleNo
Dropped Control ArmsNo
Spindles IncludedYes
Brakes IncludedYes
Steering IncludedYes
Sold in QuantityKit
Frame Brackets IncludedYes
Mounting Hardware IncludedYes
Welding RequiredYes