in the car lol ..
The s13 and s14 alternators are different. The binding post is located on the side of the s14 and on the back of the s13 alternator. The alternators can be interchanged with minimal customizing to the wire that attatches to the binding post.
It's located on the floor under the glove box of the car.
where is the ecu located on 1998 lincoln towncar signature series 4.6 liter
The ECU is located behind the glove box.
where is the ecu located on a honda accord 2003
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2001 mustang gt ,ecu where is located?
on the passenger side of the car in the foot well by the door behind the trim
If your car is an e30 than the swap is relatively easy. If your car is an e36 then its is more involved, needing a custom oil pan (due to the standard s14 pan hitting the e36s' cross member) and a custom driveshaft.
the ECU is located in the dash, most likely on the driver's side.
on most Chevy trucks the ecu is located behind the glovebox