I was wanting to compile a list of random junk that can be taken from other vehicles and installed into a wrangler with little or no modification and was hoping that others could add as much as possible because my knowledge is limited to a handful of things.
I know the electric fan from a 90-95 ford Taurus 3.8 works pretty well. fits up with very little modification. Should but not positive be the same for a 90-95 3.8 Mercury Sable. It will give a very slight performance upgrade given the motor is no longer carrying the fan.
Seats from "Sunfire: '95-'03, 2 Door only (4 door seats require some drilling)
Cavalier: '95-'03, 2 Door only (4 door seats require some drilling)'03 Cavi Write-up by instg8tor on Jeepforum
Sunbird: '99-'01, 2 Door only (4 door seats require some drilling)
Olds Acheiva: '96,'97
Grand Am: '95-'01
Grand Prix: '95-'01 (These WILL NOT direct bolt into a late 70's CJ.)
Sunfire: '95-'03, 2 Door only (4 door seats require some drilling)"
http://www.jeepforum.com/wiki/index.php/CJ/YJ_Seat_swaps