Spring Rates

[Demps]

I have a few questions and observations. My experience is mainly with '95s but I've worked on or helped others work on other years.

Some observations:
1) I think the plant used what ever parts they had at the time to put on cars.
2) I have '95s with different spring rates--I'm assuming at least as they have different markings.
3) I have seen different spring rates on other years.
4) The '95s became more of a GT car than the '90 Sports car.

Questions:
1) What do the spring rate codes mean.
2) What are all of the spring rates, codes and correlation between the two?

I have seen "FHA 1-3" and an "FHA 1-5" fronts. What are the rates?
I have also seen "RHY 1-1" and "RHY 1-3" rears. What are the rates?

Is there any difference?

Ted