is the correct 55 Amp alternator with the D1ZF-10300-AA part number used on 71 429
Rear view of the 55 Amp alternator.
From the factory, a red highlight was placed over the
part number as shown in this picture.
This is the 3.05" diameter D1Z stamped steel
alternator pulley used on the 429 CJ/SCJ Mustang.
Note that both the Pulley and Fan were both Yellow Dichromate coated as
shown in the sample above from a 428 CJ.
Alternator Pulley was marked with;
Service part number D1ZZ-10944-A and stamped Engineering part number
Machined -vs- Stamped
We have found two different versions of
these pulleys - one in stamped steel and one machined. The best we can tell,
it appears that the original factory pulleys were the stamped steel and some
of the service pulleys were machined.
Voltage Regulator and installed view
AMK Products - Below photos are of AMK's reproduction 429
Alternator and Voltage Regulator
Alternator Wiring - this photo shows at proper attachment
of the wire harness to the alternator.
Alternator Splash Shield
This is an ultra-rare 429 Mustang Alternator Splash
Shield. It was made of a sheet of rubberized material and was held in
place by fasteners which mounted into the side of the passenger frame
rail. A sample of the grommet used to attach the shield to the frame
is shown below;
Template to Make Your Own Alternator Splash Shield
Group member John McMasters has kindly provided a template based on his
original shield for those who want to make their own. Click the link below
to download the pdf format template:
Alternator Splash Shield Template
Note: To open the template file, you must have Adobe Reader downloaded on
your computer. For your convenience, here is a link to the Adobe website
where the Reader download is located:
For 1971, Ford offered both a Group 24 and a 27 battery, but the 429
Mustang/Cougar used only the 27F. A correct Autolite Group 27F Battery is
shown above, as well as an installed view. The battery tray, hold down,
and fender bracket are also shown above. For those wishing to buy the
Autolite 24F Battery cover that fits over the top of a standard battery,
here are the dimensions of the battery you will need and the post hole
locations for the cover to fit;