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Ted the springs are out of my 87 Formula the cars stance was fine when removed. All springs had 3 letter codes on the RPO sheet or on tags. Most Irocs and WS6 birds came with BZX or BZW front springs and NNL or NNN rear springs. They were some of the stiffest stock 3rd gen springs. The spring rates on the V6 and non ac cars were lower,I'd have to look up what their 3 digit code was
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