You probably should give more info: are the springs in the car or out of the car?
I'll assume "in"
On a level floor, measure vertically from the floor up to the center of the end of the inner A-arm pivot shaft at the front.
Measure from the floor up to the lower face of the boss on the lower end of the steering knuckle (the boss is the one with the hole through which the lower ball joint stud extends).
The difference between the two measurements should be 3 and 5/8 inches, + or - 1/2 inch, with the inner measurement being the larger. A difference of less than 3 and 1/8 inch (or worst case, where the outer measurement is greater than the inner), would indicate the springs need replacing.
When you measure the other side, the difference in measurements should be within the same spec, and the two measurements within 1/2 inch of the first side.
