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![](PageWidthSpacer3.jpg)
![](pulleyicon.jpg)
This page explains which engine pulleys were used as well
as the belt routing for the 71 429
Mustang and Cougar.
(Note: Click thumbnails to enlarge pictures.)
429 CJ/SCJ Belt
Routing Diagrams |
![429CJfead.jpg (89664 bytes)](images/429CJfead_small.jpg)
429 CJ with A/C |
429 CJ without A/C |
![](jimginger540_small.jpg) 429 SCJ
(note: P/S or idler not present in this photo) |
A/C Idler
Two A/C Idlers were used together on the 429 CJ with
Air Conditioning. An Adjustable Idler up next to the A/C compressor and a
Fixed Idler that bolted to the P/S Bracket and Water Pump.
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A/C Idler - Adjustable |
This is the Adjustable A/C
Idler. It was used to adjust belt tension on the A/C compressor. A square slot
was placed in the bracket to allow a breaker bar to be inserted and
levered by the mechanic to set belt tension. The factory part
number from the MPC for this part is D0AZ-8678-C, however no
stamped part number is visible on parts we have examined. Installed views
of the Adjustable A/C Idler are shown below.
![acidler7.jpg (113804 bytes)](acidler7_small.jpg)
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A/C Idler - Fixed |
This is the Fixed A/C Idler that bolted to the Water
pump and P/S bracket. We suspect this fixed idler was used to keep the
belt from vibrating on the long span from the A/C Compressor to the Crank
Pulley. The factory part number for this part is D0AZ- 8678-B, however,
the service part seems to be far more common at swap meets. It has part
number D3AH-8A617-AA as shown below left. An installed view of the Fixed
Idler is shown below right.
![fixedidler4.jpg (33531 bytes)](images/fixedidler4_small.jpg)
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Powersteering Pulley |
![PSpulley.jpg (63942 bytes)](PSpulley_small.jpg)
This is the P/S Pulley (Part #D0AR-3D673-A) used on the 429
CJ/SCJ. It had a diameter of 5 5/8".
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Note To Our 429 CJ/SCJ Torino/Cyclone/Ranchero Friends:
During the research for this page, it was noted that several of the pulley's
listed above for the 71 429 CJ/SCJ Mustang and Cougar had different part
numbers/diameters than those listed for your 429 CJ/SCJ Torino/Cyclone/Ranchero
applications. Please be aware of this when using this site and we recommend that
you reference the MPC for the correct part numbers for your vehicles.
![](roadnash4c.jpg)
429 Group Member Cars at the Mustang 40th
Anniversary
![](jimgingerb23.jpg)
Jim Ginger's 429 CJ Mach 1
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