If you have to ask, I suggest you take it to a garage.
Jack the car up by the transmission pan if you have to...
no
It is located on the top of the valve cover, towards the back of the engine, under the upper intake plenum.
It isn't feasible to convert from two wheel drive to four wheel drive.
NO, The frames are made different.
44
1
Around 4000 lbs.
36 millimeter on 2wheel drive
Buy a tester.
No , a 1994 Mercury Cougar is rear wheel drive
6 lug same as Nissan,Toyota
Yes , the 1999 Mercury Cougar is FRONT wheel drive