From Mechanical Database
Certain 1st gen Neon springs can be used successfully to lower a 2nd gen Neons. To do this, 416 should be used on the front right, 414 on the front left, and 285 on both rear locations. The 285 springs are the tallest first-generation springs ever used, and they are not currently available new. The 285 springs might be superseded by the 335 springs. The "416" (for example) is the last 3 digits of the part number. It is in large print on the spring tag, and any counter worker at a dealership should be able to find the complete part number if they are given the application and vehicle type.
If 1st gen Neon springs are used that are any shorter (lower part number) than those, the result will be insufficient travel.
These springs are 1st gen R/T & ACR springs, so the rates are 150 lb/in front and 120 lb/in rear. The rear springs will not stay under tension when the car is jacked up so be aware that they may clunk when you lower the car back down. If you're really concerned, you can use plastic zip-ties to secure the springs to the perches. However this has no negative effects, other than the occasional clunk noise.