I have done this swap. Runs great.
Harness integration difficulty depends on how much electrical you want to be Ford and how much you want to leave as Jeep. If you just add engine harness while leaving the body harness Jeep it is 4 wires to tie together (plus power runs for your fuel pump/inertia switch and extra grounds you will need to keep EEC power stable).
In space terms, you may have problem with the power steering and A/C compressor locations for 1994 accessory set. The A/C is low on driver side, right? And I think the stock ford ps pump sticks out pretty far from head? Those may be an issue. In Jeep, your stock power steering lines, and lower radiator hose, and the bottom edge of inner fender all want some of that same space. But, the smog pump will be fine.
You can get the electric fan set for a Contour to use on stock radiator. Will bolt right to radiator mounts and works/looks like it was made for Jeep.
I used a set of f150 4x4 shorty truck headers (pace setter brand, CARB certified) for exhaust in combination with mechanical clutch linkage, fit fine. I ran full dual exhaust pipes with an H-pipe for balance.
Driveshafts will be a function of transmission you use and lift combination, and how liberally you plan to apply the gas pedal or do flexy offroad stuff. I spent $200 having my rear shortened 1.5" and adding longer sliding splines, and lengthening the front one 1 inch with longer slide splines.
Invest in drive flanges or 1 piece axle shafts for rear also. The 5.0 makes enough torque to cause problems on stock parts at floating end. If you add a traction device like a locker or strong posi, I would tell you to weld your axle tubes to the center section also. You will have plenty of power to twist them if you dont (ask me how I know).
Let me know what else I can help. I changed lots of stuff over the years....
