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I checked all the pictures last year, of the build on that Pontiac Chief. Very impressive. I'd love to do something similar to a 65 Rambler Marlin, if only I had the drive. Anyways.

The standard Springs from autozone, for a 92-96 Roadmaster sedan. The spring rates are a very slight touch stiffer than the stock Roadmaster FE1 springs, but they are not even close to the spring rate of the FE2 "HD" springs. Unfortunately, new soft "FE1" springs, won't sit a ton lower than the HD springs, as from the factory, the ride heights were not that different. Just the spring rates. The FE1 springs however, have a HUGE tendancy to sag.

Or, I can always get you a pair of stock FE1 Roadmaster springs from my 95 Red RMS. I want to get it on the road as my daily driver, but I can't stand the soft springs up front, or the fact that it sits at an impala SS height in the front. I already replaced the rears, and now it has a lot of "Rake".

Another option would be to have a custom set of springs made. Which would be quite a bit of $$$. Or, look through the moog catalog, and try to find something with a softer spring rate that would work.

The HD front springs were a 77 n/M or basically a 440# rate. The soft, FE1 springs were a 53 n/M, or rough estimate a 300# rate. So you can see the HD springs were about 45% stiffer than the soft springs.

First row of pictures is when I had first bought it. The other pictures are after I swapped the rear springs.



 

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The 4.3 Civi Caprice Sedans would have also used an FE1 spring.. The 9C1 suspension RPO wasn't FE2, but the springs were extremely similar.
 
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