Ok, so between what both of you guys (Kirbert and CosmoXL) are saying, the appearance of the springs length in their relaxed positions should be inconsequential based on their stoutness. This information gives me a sigh of relief, thanks guys.
I am anxious to measure the height difference between the original front springs and the new ones but I’ve been to chicken $h&t to attempt removing the front springs so far. I have the Jaguar JD115 tool that I used on XJ81 but there is no sensible way to use it on the XJS because they didn’t provide any notches in the perch to get the T-shaped rod through in order to sit in the indents of the perch. By the looks of things the only way to actually use the tool is to completely remove the subframe and back the rod down through the top “sigh”.
I seem to have diverted this wheel alignment thread into a suspension overhaul type of thing, but it seems obvious to me that if the ball joints, radius arm bushings, tie rod ends, control arm bushings, etc… aren’t up to snuff, your wheel alignment will never be spot on.
I really do wish that someone, anyone could explain how to make and use those tubes that are used in the front control arms to set the ride height of the front suspension for measurement. The ROM is vague at best and I’ve not read or seen any illustration of their use. The closest I’ve come to an explanation is that the tubes are negligible. Does anyone actually know how to make and use them?