The 429 CJ/SCJ Paper Engine Tag
Did the 71 429 Mustang come with a paper engine tag on
the front valve cover like the '71 Boss 351 above? The answer is yes! The
photos below confirm this and show the tag was located on the front surface of the
429 CJ/SCJ passenger side
This is a period photo of a 429 CJ Cyclone showing what this sticker looked like.
The picture at left shows the mark remaining from the
paper engine tag sticker on a 71 429 Mustang valve cover while the
photo at right actually shows one of these stickers on a 71 429
Unfortunately, all the details on this tag are not
visible in the photos above.
However, based on information from other '71 tags and information from a
429 Group survey, we have taken a
stab a constructing what the '71 429 Mustang tag probably looked like
So How Did We Come Up With This? Here's Our Logic;
First of all, the alpha-numeric code on this tag is the same code as the one shown on the metal Engine ID tag under the coil
and the Engine Tag Number from the top left corner of the buildsheet
. If you look at this engine code chart
from the MPC
, you will see
code for a 429 CJ/SCJ will be a three digit number ranging from 824 to 838
with the precise code depending on CJ , SCJ, vehicle type and transmission
type. Based on a survey taken of our group, we have found the
following codes apply to the 71 429 Mustang and Cougar;
Mustang/Cougar Paper Engine Application Chart
Paper Tag Code
|CJ or SCJ
||C6 or 4 speed
So we now know which Paper Tag Code goes
with which 429 Mustang/Cougar application. What about the number in
the lower left corner of the tag? This is the ignition timing for the
engine and is 10 degrees for both the 429 CJ and SCJ engine. Regarding the "L"
in the upper left hand corner - it is not known what this meant but we are
assuming it is the same for the 429 tag since "L" is used for
all other period Ford engine stickers.
If you would like to have one of
these stickers for your 71 429 Mustang or Cougar, click on the Engine Tag
Template link below and follow the instructions!
Make Your Own Paper Engine Tag Instructions
1. Click the following link to open the Microsoft Word file:
Note: The template below may take up to 1 minute to open on some
2. Save it to Microsoft Word.
Print this Microsoft Word template out on a sheet of #8161 1"x4" white
address labels available at your local office supply store.
4. Select the appropriate tag off the sheet for your application based on the
Application Chart above.
5. Trim the rounded corners off each end of the tag to make it rectangular.
6. Use solvent to clean and degrease the front surface of your valve cover.
Stick the tag on the front surface of the passenger side valve cover (in the
same location as shown in the photos above of the original 429 stickers).
7. Obtain a transparent sticker (I used shipping tape) and cut a rectangle that
overlaps the perimeter of the paper sticker by about 1/8". Overlay the
clear sticker over the paper engine tag to protect it and produce a shiny
covering like that used on the original Paper Engine Tag.