I pulled a set of front springs from an '84 v8 standard camaro and have no idea of the rate. Both yellow tags have: BKR 14034238. I want to replace my teeth jarring iroc springs. Anyone know what these things are?

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89 iroc,zz4/700r4/3:70 gears/koni yellows/herb adams bars/and alot of other crap to make it work!