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CHASSIS

Chassis Components & Detailed Reference Guide

Explore accurate chassis parts designed for classic Mustang and Cougar models. Compare original and reproduction components with clear visual references.

Red vehicle chassis diagram with text 'Chassis'.

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“SHORT”

71/72 Single Exhaust

“LONG”

Straight Version (left)  for 73 Single Exhaust and Angled Version (right) for 71 – 73 Dual Exhaust.

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Mustang exhaust installation manual diagram.

 Tie Down Brackets

Two tiedown brackets were bolted to the frame just below the rear bumper and were a tiedown bracket for the car during shipping. Based on research todate, this is our best shot at the applications for these; The “Short” ones at left were most likely used on 71 – 72 Mustangs with single exhaust. There were two “Long” versions (as shown above), a Straight and an Angled. We believe the Straight were used on 73 Mustangs with single exhaust. The Angled ones were most likely used on 71 – 73 Mustangs with dual exhaust so the tiedown chains wouldn’t damage the chrome tips. This page info will be updated if additional  information is discovered. Installed views of Long Angled version are below.

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Headlight buckets

Nicely restored samples shown above. Note head light bucket stamps located in same location as original stamp prior to resto.

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Hood Latch/Braces

Hood Pin

Shock Tower Braces

Hood Pin Engagement Brackets

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Motor Mounts

The 429 Mustang/Cougar motor mount assembly was made up of three pieces –  a Frame Mount, an Insulator, and a Block Mount.  

Exploded car engine mount assembly diagram.

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Headlight buckets

429 Frame Mount

The left and right Frame Mounts are shown above. Various installed views are shown below.

A word about the 351 C Mustang Frame Mount

We often get asked if the 351 C Mustang frame mount is the same as the 429 Mustang frame mount. The answer is NO. The top surface of the 351 frame mount is just a little bit taller than the 429 frame mount. This taller height will prevent the 429 insulator from dropping down far enough to properly line up with the thru-bolt holes as shown in the photo below;

Engine mount diagram with bolt misalignment

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Insulators

The Insulator is the intermediate piece between the Frame Mount and the Block Mount. It consists of two metal plates with an insulating rubber mount in between. An installed view to the Block Mount is shown below. A long thru-bolt secures the Insulator to the Frame Mount.

Close-up of blue mechanical component with screws, bolts.

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Black Mount

The left and right Block Mounts are shown above and an installed shot below.

Blue engine block with cylinder head ports visible.

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Structure

Complete 71 Mustang Undercarriage

Thanks to Mark Bondy for these photos.

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Mustang and Cougar underbody dimensions diagram.

71 Mustang/Cougar Frame Dimensions

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These are good shots showing the front structure of the 71 Mustang.

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Assembly line at Ford River Rouge Complex, workers assembling cars.