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Speedway 1955-1959 Chevy Truck Crossmember

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Specs
Material Type:
Steel
Sold in Quantity:
Kit
Finish:
Natural
Material Thickness:
.18
Notes
Includes crossmember and shock cups.
Speedway 1955-1959 Chevy Truck Crossmember
Speedway 1955-1959 Chevy Truck Crossmember
Speedway 1955-1959 Chevy Truck Crossmember

Click image to enlarge

Details

Reviews (4)

Q & A (3)

What's in the Box

Info

These Speedway Mustang IFS kits for 1955-1959 Chevy pickups are natural conversions to improve your vehicles suspension, handling, and overall performance. The Chevy models have frames and fenders which lend themselves nicely to the Mustang front end conversion, without changing the critical geometry.  Like our Ford kits, Chevy kits do not bumpsteer at all.  Included in these kits are illustrated installation instructions.

  • Mounting points of all control arms match the original Ford design
  • Factory anti-drive built right in
  • 1955-1959 Chevy Pickup frames
  • All Speedway crossmembers come in Deluxe versions (welds ground)
  • Constructed of 7-gauge steel
  • Mustang II cross members using stock spindles will drop the stock ride height 3-4”
  • One-Piece Shock Cups are T.I.G. welded in place and have anti-dive built in.
  • Vertical Inner Uprights.  This is the strongest design available, with twice the weld area.  This will keep your frame from twisting!
  • Crossmember and Spring Towers precut and pre-welded to fit your frame
  • Lower control arm pivot tubes and gussets are NOT included
  • Frame Front Boxing Plates are available for added strength/support (91054429)
  • Works with both manual or power rack and pinions
  • Requires use of 2" inner tie rod extensions

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)

910-34429 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 (91054429) are also available for these crossmembers for added strength and support.  You must use 2" inner tie rod extensions for proper steering geometry with these crossmembers.

Note:  This crossmember requires the use of rack extensions (91034345) for the manual or the power rack. Further, rack spacers are also required when a power rack is used.  Please consider item #910-34346 or 910-1023

Item Details

1955-59 Chevy Pick-Up
(requires use of longer tie rod ends)
Complete installation may require you to purchase corresponding a-arms, shocks, springs, brake kit, spindles, and steering rack and pinion

Notes

Overall Benefit:  In a word, "handling". While installing a Mustang II can look like a lot of work, in reality, the improved handling and ride quality are worth the effort. Combine that with improved stopping ability due to numerous brake options and it becomes more a question of “Why wouldn’t you?”.  The independent suspension will give you a much better ride because there is double the suspension travel. A stock axle will give you maybe 2-1/2” of total travel vs. a Mustang II which will give you about 4-1/2”- 5” of travel. There are multiple spring rates available to accommodate varied applications and the rack and pinion steering is much more responsive than a standard steering box. 

Drop:  This varies and is dependent on application and options. Most kits drop the vehicle by 3-4”.  Drop spindles and running lower profile tires than stock also adds to the amount of drop that can be achieved.

Track Width:  You may want to mount custom wheels to your Mustang II conversion and determining proper track width for your application is essential for figuring correct backspacing and overall ride stance.  Standard wheel base is 56-1/2” with a 60” version available for trucks. The various options for brake kits will vary this somewhat and some kits can add roughly 2” to the overall track width. Narrowed arms are available to move the wheel in by 5/8” on each side.  See the link below for various track widths with different options.

 Mustang II Track Width Options (PDF)

Assembly Notes: Either manual or power steering can be used with these crossmembers.  The passenger side mount has a slot that will take the later model power rack.  With all Mustang II aftermarket crossmembers, spacers and longer bolts must be used with the later (Fox-body) power rack. 

Rack mounts are incorporated into the crossmember design and rotate the rack back 20° to get the input shaft lower. Stock, manual, power racks, or later model Mustang II or T-Bird power racks can be used. The rack is positioned so the bellows will clear most aftermarket full A-Arms. You must use 2" inner tie rod extensions for proper steering geometry with racks for these crossmembers.  When using crossmembers with our "power" steering rack, you may also need (2) rack spacers (9101023). (These spacers are included with our Mustang II suspension kits.)

The holes for the lower control arms are 1/2″ (stock). If you will use tubular lower A-Arms instead of the stock lower arms, the lower pivot holes will have to be drilled out to 5/8″. 

These crossmembers will work with stock control arms. If used with stock arms, these will require strut rods and strut mounts for installation. Speedway crossmembers DO NOT include strut rod mounting brackets. We recommend either our offset or no-strut control arms or the tubular strut rod (91034322).

Customer Reviews

Rated 5 out of 5 by 4 reviewers.
RATING BREAKDOWN
4 reviews
5 Stars
4
4 Stars
0
3 Stars
0
2 Stars
0
1 Star
0
RECOMMEND THIS PRODUCT:

buddyroe38
Sikeston, MO 63801, USA

Great Fit

September 29, 2013
I ordered this product for a 1958 Chevy pick=up that I wanted to maked a show truck out of. The shipping was fast and was just what I ordered. The instructions were very detailed which made for easy installation. The drop was perfect and the best thing was the perfect fit which made the weld so much easier and precise. Great product would recommend highly!
Pros:
  • priceshipping fit ease of install
Cons:
  • None
Yes, I recommend this product.
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Was this review helpful? 0 0

homshillbillyhotrods
Conroe, TX, USA

weld in crossmember

February 26, 2013
price is right and easy to install for some higher skilled fabricators
Pros:
  • Price
  • tophats degreed
Cons:
  • metal will bend if bottom control arms hit
Yes, I recommend this product.
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Was this review helpful? 0 0

Mike23impala
Wisconsin, USA

shipped fast/ great product

October 23, 2012
had to trim frame slightly to get center section up into rails but once in fits great, looks awesome, cant wait to finish and drive!!!
Yes, I recommend this product.
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Was this review helpful? 0 0

cant catch me 55
Baraboo, Wi

Great product

August 28, 2010
nice welds
Pros:
  • Price
  • Nicely constructed
Yes, I recommend this product.
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Was this review helpful? 0 0

Page 1 of 1

Product Q&A

3 questions : 3 answers

1 answers

if i get this part will i be able to use the parts of a 78 mustang because i have one now

daraw1
September 08, 2014

if i get this part will i be able to use the parts of a 78 mustang because i have one now

Answers

September 08, 2014
EricM
Yes you can use the suspension parts from a '78 Mustang when using this crossmember. You will also need rack spacers 9101023 as well as tie rod extensions 91034345.
1 answers

on a 1955 chevy pickup with a 350sbc and 350 transmission what spring would you use? spring weight and part number

stringbean
benton arkan
October 20, 2015

on a 1955 chevy pickup with a 350sbc and 350 transmission what spring would you use? spring weight and part number

Answers

October 23, 2015
John
Expert
On a 55-59 Chevy pickup Mustang II with standard springs and shocks running a small block V8 and automatic we would recommend most commonly a 375 spring rate unless there is additional frame boxing or weight. If you have A/C or a big block go to the next rate up and if both a big block and air go up to a 425 spring rate.
1 answers

Do you need the 2" tie rod spacers if running the power rack for this crossmember? If so what is the part number? Thanks

Nick
Trooper, Pa
June 16, 2016

Do you need the 2" tie rod spacers if running the power rack for this crossmember? If so what is the part number? Thanks

Answers

June 17, 2016
Zach
Expert
Yes you need to use inner tie rod extensions p/n 91034345-pow
Page 1 of 1

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