Thanks for your answers!
An update: The coilovers are Pro Shock, not QA1, and Pro Schock makes 9" springs, so the springs have probably been 9" all the time.
I have decided to change into stiffer ones.
Should I buy Chrome or "near chrome" silver powdercoated springs?
I have polished stainless steel A-arms, so chrome will look best when new, but is chrome springs "show, not go"?
Which of them will look best after some years of use?