73' B3 340 Duster pro touring build

how about a measurement as the car sits......just curious

if the (installed) spring measures 8" at ride height....that would be a 20% collapse.....the pre-load measurement does not enter into the equation.

according to QA1....in this example, you should have a softer spring....the spring ideally should collapse 25-30%

Okay the front springs are 350 and are 8 1/2" at ride height on a 10" spring. The rear are 9 3/8" ride height on a 12" spring. Any guess on what to try for spring rate
next ??