Another measurement that may not help, but hey, every scrap of info just might add up to something useful.
My K20 has 2.5" Softrides up front. Measuring from top of spring right in front of the mounting plate to the bottom of frame, the passenger's side is 7 5/8" and the driver's side is 7 3/4".
My rear springs are kind of a mishmash so I didn't bother to check (stock springs + AALs + Hellwig overloads).