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: 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. You must use 2" inner tie rod extensions for proper steering geometry with racks for these crossmembers.

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).

Have a Question?

Call one of our U.S.-based customer service professionals.

Tech Support - Opens at NaNpm (UTC)

Details

These are Heidts Mustang II crossmembers for 1955-59 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.

Mounting points of all control arms match the original Ford design
Factory anti-drive built right in
1955-59 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 (91054429)
Works with manual rack and pinion ONLY
Requires use of 2" inner tie rod extensions

For a LARGER selection at a LOWER price, see Speedways 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)

Note: Additional items may be needed to complete installation. You 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.

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.

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

Charts

413-34429 Crossmember Installation Instructions (PDF)

Guides & Documents

Crossmembers Installation Instructions (41334429)

Crossmembers Technical Information (41334429)

CA Prop 65

Specifications

KEY SPECS
MFG. Part #	CX-308-E
Brand	Heidts
Position	Front
Crossmember Type	Mustang II
Crossmember Style	Boxed
Attachment Style	Weld-on

GENERAL
Steering System Compatibility	Manual Rack and Pinion
Control Arm Compatibility	Tubular or Stock
Tie Rod Extensions Required	Yes
Material Type	Steel
Material Gauge	7-gauge
Finish	Natural
Ride Height (w/Stock Spindles)	3" to 4" Lowered
Material Thickness	0.18"
Sold in Quantity	Kit
Notes	Includes crossmember, boxing plates, and shock cups.
GTIN Code	887753175502

Ratings & Reviews

1 Review

Write A Review

1 reviews

Filter by Ratings

Sort Reviews

YES

5.0

3 years ago

NEIL

Verified

FIT GREAT

Would Recommend

Showing 1 of 1 reviews

Questions & Answers

1 Question • 1 Answer

Sort Questions

Running this kit on my 55 chevy truck what engine mount kit would you suggest for 454 4 speed

by Still sitting in the garage

• 3 years ago

1 answer

View Answer

1 of 1 questions shown