Menu

Shop

Garage

Cart

Account

Product Summary

Stock Height Spindle Type

  • Includes Mustang II front spindles/disc brakes/rack and pinion steering with Ford 9" Posi rear end
  • Complete chassis assembly for 1/2 ton GM trucks only
  • Replicates shape and dimensions of original Chevy frame
  • Welded on a rail fixture to ensure proper shape
  • Completely bolt in cross member for 1947-54 Chevy/GMC trucks - no welding required

Comes as a Kit

Key Specs

BrandSpeedway Motors

Need To Know

Made to Order

This custom item will ship when completed

Truck Ship

Truck shipments must be pre-paid with a credit card, certified check or money order

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!

Kit Includes:

  • (1) 1947-1954 Chevy 1/2 Ton Pickup Truck Frame Rails Kit with Crossmembers and Support Rails
  • (1) 1947-54 Chevy Pickup Motor Mounts for Bolt-In IFS
  • (1) 1947-1954 1/2 Ton Chevy/GMC Pickup Power Brake Pedal Assembly
  • (1) Speedway 1947-54 Chevy Truck 4-Link Rear Suspension Kit
  • (1) 1947-54 4-Link 9 Inch Housing with Brackets
  • (1) Speedway Ford 9 Inch Posi Traction 3rd Member Assembly, 31 Spl, 3.50
  • (2) Currie 9 Inch Ford 31 Spline Axle Shafts
  • (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
  • (2) Sets 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

 

Frame Kit

  • Laser cut from 7-gauge steel plate
  • Replicates shape and dimensions of original Chevy frame
  • Welded on a rail fixture to ensure proper shape
  • Ground and sanded to prep for finishing
  • For '47-'54 1/2 pickups
  • Bolt in lower radiator support to replace your rusted or missing original
  • Ideal replacement to avoid trimming your original for steering rack clearance
  • Tubular steel bolt-together assembly – no welding required
  • Laser cut from 11-gauge steel plate
  • Bolt-in boxing plates add strength to frame
  • Provides extra mounting options for fuel tank and exhaust

Parts List (PDF)

NOTE: Finish will be plain steel, not powder coated as shown.

 

Motor Mounts

  • Small Block Chevy bolt-in motor mounts for use with Speedway 47-54 Chevy Pickup Mustang II Bolt-In Crossmember
  • Kit includes steel frame mounts, steel engine mounts, rubber cushion set, and all hardware

 

Brake Pedal Assembly

  • Allow you to easily install power brakes on your 1947-1954 half ton Chevy and GMC truck
  • Will NOT work in conjunction with the factory clutch pedal
  • Intended for use with an auto transmission

 

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
  • 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

 

Speedway 1947-54 Chevy Truck 4-Link Rear Suspension Kit

  • Allows the do-it-yourself rodder to use the rear end of their choice
  • Modern geometry and handling
  • Chromoly four bars with urethane bushings
  • Bolt-on frame brackets and shock crossmember
  • The length of the upper bars is 16" eye to eye
  • The length of the lower bars is 21.5" eye to eye
  • 1/2 ton chassis application only
  • Kit will locate rear axle centerline in the original factory housing center line, and as such, it retains the original wheel base and the tire/wheel will not be centered in the fender opening as they will be located in the original factory location.

NOTE: Finish will be plain steel, not powder coated as shown.

 

Speedway Ford 9 Inch Posi Traction 3rd Member Assembly, 31 Spl, 3.50

  • Hand-assembled by our trained technicians for an unbeatable combination of quality and value
  • Track-tested durability in our own cars – we race what we sell
  • Precision assembly for the correct backlash, preload, and proper amount of pinion shims to ensure the correct pattern on the ring gear teeth 
  • Ring and pinion gears of 8620 cold-rolled steel for long wear
  • Nodular iron housing is stronger than OEM “gray” iron and has 4 lbs of additional reinforcement
  • Large bearing “Daytona” style pinion bearing supports for strength and reliability
  • Spacer and shim setup maintains critical pinion depth settings and easier to service than traditional crush sleeves
  • Richmond Powertrax Grip Pro spiral gear differential gives positive traction without the noise of a full locker
  • Ring gears assembled with Grade 9 hardware, 15% stronger in tensile strength than Grade 8
  • Viton® pinion seal, resistant to chemicals and high temperatures
  • Grade 8 Carrier cap bolts
  • Lock-style pinion nut with pre-applied Loctite®
  • Grade 5 pinion support bolts
  • Includes form fitted, reusable red poly storage case

 

Currie 9 Inch Ford 31 Spline Axle Shafts

  • This custom cut and splined Currie Enterprises axle shaft is for Speedway housing 91046260 or 91047258 and other 9" Ford rearends
  • Works with New Big Ford (Torino) bearing ends
  • Flanges are dual-drilled for both 5 on 4-1/2" Ford/Mopar and 5 on 4-3/4" GM wheel bolt patterns
  • Induction heat treated 1541 forged alloy
  • 31-spline
  • 2.5" brake space offset

 

Charts

Warranties

Coil Springs

AFCOILS® springs are manufactured using the finest spring material available. They are designed for extended life and consistent performance. They are guaranteed to do the job for which they are designed for as long as they are owned by the original purchaser.

AFCO will replace any AFCOILS® spring that ever exceeds the maximum allowable 2% loss of free height from original nominal specification. One way freight is included.

  1. Guarantee applies to original retail purchaser only.
  2. Damaged springs not covered by warranty.
  3. Spring must be returned to AFCO freight prepaid along with a copy of the original invoice.
  4. No other warranty, either expressed or implied, applies to AFCOILS® springs.

(Warranty not valid without invoice.)

 

3rd Member

No warranty is offered or made for durability or specific performance. No warranty is offered for commercial, off road, street performance, or racing use.

 

Guides & Documents

Specifications

KEY SPECS
BrandSpeedway Motors
GENERAL
Spindle TypeStock Height
Sold in QuantityKit