Why don't you just have some wood blocks cut. That is what those shackles remind me of. Back in the day when we would make body lifts from hardwoods and home made shackles. Used to lower our cars by heating the springs up with a torch and squish them down. Be careful with those shackles.

 

Yeah i have decided otherwise on the first "old school" ones lol bad reviews everywhere i looked.

 

if you were going to but lowering shackles why not just order a set of lifted shcakles from springtech?