These Speedway Mustang IFS kits for 1933-34 Fords are natural conversions to improve your vehicle's suspension, handling, and overall performance. They retain all the factory dimensions and locations, so you get all the benefit of factory Ford engineering in your front end. There is no need to widen or otherwise modify the Ford design or use long tie rod ends!
Included in these kits are all the special, hard-to-make brackets and mounts you will need to complete the installation, plus illustrated installation instructions.
- 1933-1934 Ford passenger car 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!
- Lower control arm pivot tubes and gussets are NOT included
- Frame Front Boxing Plates are available for added strength/support (91054422)
- Works with manual rack and pinion ONLY
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)
910-34422 Crossmember Installation Instructions (PDF)
Note: Radiator tabs included. 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 (91054422) are also available for these crossmembers for added strength and support.
Note: This crossmember application is designed to only be used with a manual steering rack/pinion. A power steering rack will interfere with the radiator and/or radiator support brackets.
Note: Applications where the vehicle has fenders that mount directly on top of the frame, the fenders will require extensive modification to allow clearance for the upper cross member section.
These crossmembers fit:
Note: Mustang conversion kits are not available for the Model A or 1932 Ford. These cars, because of their direct mounting low fenders, require modifying the Ford IFS design by relocating the upper control arm inner pivot to clear the fender, causing a very noticeable amount of bumpsteer!
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: 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″. Lower control arm pivot tubes and gussets are not included.
These crossmembers 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).
Complete installation may require you to purchase corresponding a-arms, shocks, springs, brake kit, spindles, and steering rack and pinion