Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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America's Oldest Speed Shop ®


1947-1954 Chevy Pickup Front Frame Boxing Plates

SAME DAY SHIPPING! Most orders ship within 24 hours.

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May require cutting, grinding, and welding.
1947-1954 Chevy Pickup Front Frame Boxing Plates

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Please NOTE the following about this product:

  • This item is sold as a pair.



Q & A

What's in the Box

When using original or reproduction frame rails, be sure to fully box the front section for strength and saftey. Our front boxing plates are designed to box the frame in critical front suspension attachment points and motor mount areas.

10 gauge.

You may also be interested in:

Heidts CX-307E Mustang II Crossmember for 1947-54 Chevy Pickup Frame, Kit
(Part #413307)
                        These are Heidt's Mustang II crossmembers for 1947-54 Chevy Pickups.  The Chevy models have frames and fenders which lend themselves   nicely to Mustang front end conversion, without changing the critical   geometry.  Chevy IFS kits also come complete with the hard-to-make   special brackets, such as radiator perch on certian models, to quickly   and easily complete the installation.  Like Heidts Ford kits, Chevy kits   do not bumpsteer at all.  Chevy kits come with a step-by-step,   fully-illustrated instruction booklet to ensure that your installation   goes as easily as it should! Correct design results in correct camber   action – and no bumpsteer.
  • Longer tie rod ends aren’t used – ever!
  • Mounting points of all control arms match the original Ford design
  • Factory anti-drive built right in
  • 1947-54 Chevy Pickup frames
  • Economy (unground welds)
  • Constructed of 7-gauge steel
  • Mustang II cross members using stock spindles will drop the stock ride height 3-4”
  • Built-in Anti-Dive is all fitted to your frame…No Grinding Required!  Nothing to measure or trim…It’s All Done!
  • One-Piece Shock Cups are T.I.G. welded in place and have anti-dive built in. First class, for your car.
  • Vertical Inner Uprights.  This is the strongest design available, with twice the weld area.  This will keep your frame from twisting!
  • Main crossmember made from only 2 formed pieces for maximum strength and accurate fit.
  • Crossmember and Spring Towers precut and pre-welded to fit your frame…Nothing to Measure!
  • Lower control arm pivot tubes and gussets are NOT included
  • C-Notched plates are included
  • Frame Front Boxing Plates are available for added strength/support (91054428)
  • Works with manual rack and pinion ONLY

For a LARGER selection at a LOWER price, see Speedway's collection of mustang II crossmembers.

Choose from the crossmembers below and add to an IFS kit to get a "hub to hub" front suspension.  

Mustang II Crossmember Application Chart (Link)

413-307 Crossmember Installation Instructions (PDF) 

Note: Additional items may be needed to complete installationYou may want to include our Mustang II ride height adjusters (91034444) for installation with these crossmembers to fine tune your final ride height up to 2".  Frame boxing plates (91054428) are also available for these crossmembers for added strength and support.

Note:   This crossmember is designed to be used with a manual rack only.  A "power"rack-and-pinion interferes with the radiator and/or the radiator support brackets.   

Bolt-In 1947-54 Chevy Pickup Mustang II Crossmember
(Part #91044754)

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

910-44754 Instructions (PDF)

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