Join Date: Nov 2000
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Re: Shackle concept - overengineered?
If I had to fabricate something like that, I think I'd box it in entirely for strength. I'd weld 4 pieces of flat together and leave the two longer ends exposed for the shackle bolts, spring eye and shackle mount on frame.
That said, a shackle twice as long as stock will put twice as much load on the shackle mount and frame. Do you think your old jeep can take it? I wouldn't do it. As well, the considerations mentioned above are legitimate and may require correction to the changed angles.
I think a slightly longer shackle, say 1.5 to 2" longer than stock is a cheap way to gain an (3/4) inch. That, combined with a body lift and or some fender trimming, and you should be able to fit some bigger tires, if that is what you are after.