hello 93 jx (is it 8valve or 16valve head ?) 4wd, but is is it 3sp/4speed or 5speed stick?
bad speedo cable. (odometer never fails much but speedo can) but cable is bad, (assumes gear in tail shaft spins , sure)
id not use gap-less plugs on this low energy system its know to fail. use real spark plugs the $1.49 are GReat gapped at 0.028"
noises, on front of engine
dont run it ,yet, check the crank large 17mm bolt first. make sure its at 94ft/lbs (this is undate from suz.) it must not be run below that torque.
turn bolt CW. direction. facing rear of car. use deep wall socket 17mm. (if 5speed, box, use 5th gear to do this, hand brake set very hard)
pump and belt good. upkeep... .that...
the clutch is easy, or hard (fan) depends on tools. (i have optical rpm meter for $15)
running cold, is fan stuck locked up.. , it have to be cold outside to cause rad to super cool like that, like in alaska cold.
my guess is the temp gauge, sender is fibbing or you have air pockets in head. (coolant low, in rad actual?)
the factory data and test are here
http://www.fixkick.com/overheating.html#clutch
this car run great off road, the 2door is only 2000 lbs, top off, and read seat off, less.. less is more able off road.
your rear axle has mount on top, a wish bone , mount, make sure all that is working and not rusted through.
and the 2 side rear track rods are good, and not loose.
watch out for top of tank rust trough....
and if one axle likes to slip. 1 tire, off road. (or ice)
then drag your brakes, and now get free LSD actions. car will move in 4wd true, with that trick
my new JK jeep does that in software..... drags brakes for virtual LSD.
an amazing thing to watch, and do....
this free trick cures the open axles habits, in a pinch.