US Car Tool 70-74 E-Body Leaf Spring Re-Location Kit

[3D]

Geez, Kinda makes you wonder where they got the idea from!
The E body Barracuda has been around for 45 years, nobody has thought of this before and this comes out a year after I did mine....Hmmmmmm?
Mines a little better though, I got 16.5" of room!


This is my post;
http://www.cuda-challenger.com/cc/index.php?topic=104303.msg1022548#msg1022548

This is US Car Tools New Product;
http://store.uscartool.com/70-74-E-Body-Leaf-Spring-Re-Location-Kit_p_143.html

[1 Wild R/T]

Direct Connection sold the same thing back in the 70's..

[jhaag]

Not new, been around forever. Challengers need to have the rear valance modified to clear the shackles. Also interferes with exhaust if it goes through the valance. Not sure about Cudas. 

[dave73chally]

That kit is interesting. What are the performance postitives/negatives between doing a relocation of the springs this way vs. dr. diff brackets? I have a full hotchkis suspension and want to move my springs in but don't want to effect handling if one is better for that then the other. Of course, I'd like to fit as big a tire back there as I can...

[1 Wild R/T]

The tire/wheel & axle act as a lever, moving the spring further inboard makes the lever longer so the car is more prone to sway.... In drag racing which is what the Chrysler engineers originally designed the 3" relocation kit for high speed cornering isn't a concern.... A modern street car you might be more concerned about carving corners....   

I find it funny the OP is trying to say US Cartool stole his design when in his original post he mentions the part number Chrysler sold the original kit under..... 

[3D]

Just to clarify things for others.
Yes the 3" (per side) relocation kit made by MOPAR (PART # P4120665AB) or others has been out for many years. But, it only includes the front spring mount.

Nobody (to my knowledge/research) has ever made a kit to mount the rear shackle to the frame (and this is where it gets complicated).

The following items will need to be addressed if relocating the rear springs (2" or greater, per side) inboard;
- Stock shackles can hit the rear valance, shorter shackles eliminate the need to modify the rear valance.
- Existing exhaust system may need to be modified.
- Stronger/thicker and/or custom sway bay may be required.
- Trunk pan may require modifications.
- Of course their needs to be outer frame and wheel well modifications required. Installing this kit without this will not allow for larger tires!

The following pictures are how I modified the rear frame rails.
 

[3D]

The tire/wheel & axle act as a lever, moving the spring further inboard makes the lever longer so the car is more prone to sway.... In drag racing which is what the Chrysler engineers originally designed the 3" relocation kit for high speed cornering isn't a concern.... A modern street car you might be more concerned about carving corners....   

I find it funny the OP is trying to say US Cartool stole his design when in his original post he mentions the part number Chrysler sold the original kit under..... 

  Ya, I really see a rear shackle mount in the following kit. Oh wait.....Must be those two pieces of tube. Well this is going to be an easy install.

[3D]

This is what I'm referring too.

[1 Wild R/T]

Want me to post the Chrysler supplied instructions for the rear frame?  Wait!  I don't need to cause your solution is a clone of it....

[3D]

Want me to post the Chrysler supplied instructions for the rear frame?  Wait!  I don't need to cause your solution is a clone of it....

I Don't know what kind of instructions you received. but the rear ones are no where near what I've installed or MOPAR recommends

http://www.jegs.com/InstallationInstructions/300/312/312-p4876558ab.pdf

[1 Wild R/T]

Wow, that drawing is a mess... What I have is from around 1977 & is drawn by someone with actual drafting abilities & really does look like what you did.... I know MP has sucked for years but thats just a joke..... Terrible....

[3D]

Wow, that drawing is a mess... What I have is from around 1977 & is drawn by someone with actual drafting abilities & really does look like what you did.... I know MP has sucked for years but thats just a joke..... Terrible....

Are you able to attach your drawing? Sure would like to see them.

[1 Wild R/T]

Are you able to attach your drawing? Sure would like to see them.

It would take some digging, I know I still have it, I've seen it in the past year butttt...

[HP2]

That kit is interesting. What are the performance postitives/negatives between doing a relocation of the springs this way vs. dr. diff brackets? I have a full hotchkis suspension and want to move my springs in but don't want to effect handling if one is better for that then the other. Of course, I'd like to fit as big a tire back there as I can...

The tire/wheel & axle act as a lever, moving the spring further inboard makes the lever longer so the car is more prone to sway.... In drag racing which is what the Chrysler engineers originally designed the 3" relocation kit for high speed cornering isn't a concern.... A modern street car you might be more concerned about carving corners....   

Moving the springs in does impact the effective (wheel) rate, but it isn't as large as you would think. I did some calculations on it when I moved mine in. Net result is that you will give of 10# of wheel rate for every inch you move the springs inboard. So a 3" kit is a 30# change in rate. Let me put it this way, if you can feel the change in handling in your car with a change in 4 gallons of gas, then you might notice a 30# change in wheel rate.