Not sure why, if data is not known, to take anything but the safe route. Spring compress the rears and then you know what you are dealing with going forward. Since they come out as a unit anyway, its not much more effort.
I could be wrong, but my belief is when you jack the car up, the longer stroke HDs on the rear will not hold the springs on the perch. Let us know.
distant pesky 3rd lock nuts inside the trunk are a bother!
Hi bfeng,
Thanks for the method! Do you use the band clamp to compress the springs too?
Regards,
Bill