1988 Xjs Suspention.

the torque setting is the same as for rubber bushes as the nut/washer goes up against a shoulder to prevent over tightening of the bush

it is called an engine stabilizer or wish bone.

the datum marks on the eccentric bolt heads are to help reassemble when you have replaced suspension parts to make it easy to set up the camber/castor front wheel tracking you should make a note off the original settings before dismantling use the centre setting ie middle line to dot BUT THE FRONT CAMBER/TRACKINGCASTER SHOULD BE CHECKED ADJUSTED BY A SPECIALIST WITH 4 WHEEL ALIGNMENT KIT

These are engine mounts. Some people call them dog bones.

(Caution ) sway bar end is under pressure.

1.go to AutoZone get new linkage bars or just the bushings depends on wether the bar has grooves wore into them from use and new nuts. 2. Raise and safely support vehicle,3. remove tire, 4.using floor jack safely support the lower suspension arm and raise to remove pressure on the linkage bar between swaybar end and lower arm 5. remove the nut under the lower suspension arm that retains the swaybar linkage ,6. loosen and remove nut at swaybar end. 7.at this time only lower the lower suspension arm enough to remove the linkage bar. install new bushings or bar to the swaybar end don't completely tighten nut at this time.8. install new lower bushing then jack the lower suspension arm back up aligning the lower end of the linkage with the hole in the arm once pressure is lifting the swaybar install the lower nut and tighten at this time Torque top nut to35-47 Ft lb and bottom nut 8-10- Ft lb lower the jack from under the lower arm and install tire lower vehicle ready to go Appx 1 Hr per side

1. Install the upper insulator to the shock absorber.
2. Install the nut to the tennon end. Do not tighten the nut.
3. Remove the safety stands.
4. Lower the vehicle.
5. Hold the tennon end with a wrench while torquing the nut.
Tighten
Tighten the nut to 20 N·m (15 lb ft).

Could be ball joints or tie rods check these.

You will almost certainly, (I say almost, because sometimes they seize on) need a ball joint splitter.
There are different types, but a simple to explain one is, the one that looks like a tuning fork.
As you will have to align the wheels afterwards anyway, it doesn't matter if you leave the track rod end attatched to the rack at this point.
Undo the nut on top of the said 'bush', but don't remove it totally yet.
This way you can hammer the top of the nut thus forcing it free, then unscrew little by little while hammering it through as neccesary. Alternatively, you will need to use the splitter to seperate it from the hub mount.
Good luck with that:)

WISH BONE BUSHES , ROLL BAR BUSHES, OR BUSHES IN TOP OF DAMPERS, UNLESS YOU HAVE A LOOSE BLOCK OR TRANSMISSION MOUNT

ON MINE IT WAS THE WISH BONE BUSHES, CHANGED ALL WITH THE POLYUATHANE DONE THE JOB