Re: Need Help, 70 C20 2" Lowering Shackles for 2 1/4" wide springs ?
You are essentially talking about 1/8" on each side. Most the time you can pinch the 2 1/2" to fit the 2 1/4" leafs. In the past I have also found washer that are 1/8" thick and put them on each side of the spring to make total width 2 1/2". Its really up to you on how you want to make it work. I personally would modify the wider shackles to make them work with the thinner leafs. I'm not 100% on how the leaf/shackles fit on a '70 but you may want to look into different year trucks and match something for what your wanting to do.
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