I'm searching for the cheapest way possible to get a decent spring rate under our 91 SE-R LeMons car. Right now I'm scouring craigslist for used coilover springs and am probably going to wind up cobbling something together using springs originally intended for other cars.

What length spring should I be looking for, for a 91 Sentra SE-R? I don't actually take delivery of the car for another week, so I don't have a car in front of me to measure and make my own conclusions.