The regulator should be mounted on the fender, probably on the passenger side. The regulator is a small black box.
it is about 16 ft long
inside the alternator.
Inside the rear of the alternator
It is a sliver box bolted to the firewall.
It's built into the alternator. Jim
Which regulator?
Should be under the hood, attached on the inside of the radiator support on the passenger side.
I was looking at my Chilton's Auto Repair Manual and for a 1978 Mercury Cougar it only shows a two barrel carburetor for the 351 Windsor V8 engine
If it's like my 1978 it's just in front of the battery bolted to the chassis at about the same height as the battery. You need to pull out the battery to get to it.
Bascially they are the same engine.
Mercury Zephyr was created in 1978.
need wiring diagram alternator and regulator ford 1978 f150