Adding Shackles for Extra Lift?

[Brian 444]

I have a 2002 F-350 SRW. The previous owner lifted the front end of the truck approx 2" by having the OEM springs re-arched and having an extra leaf added. Not the best way of doing things perhaps but that's what was done.
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Because the truck came with a 4" block as opposed to the 2" block most F-250s have, there is still just over an inch of rake in the trucks stance. It is just enough to bother me, but I'd rather lift the front than lower the rear.
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Is it reasonable to expect to be able to simply bolt in a longer shackle? Would this require any supporting modifications? I know that there were no replacement track bars, drag bars, panhard bars, (whatever they are called) when the springs were re-arched by the original owner.
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Would something like this work? Zone Shackles
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Thanks for the insight
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[Joel]

I would say go for it.
Might need a track bar drop bracket, but they're easy to find