Thought we might benefit from a stand alone thread on the differences between the different versions of the Mustang and in turn Shelby export braces used through the classic years rather than having members search through other threads more focused on comparing fit or reproduction verses original versions.
The "export" brace was a one piece formed metal piece that secured the shock towers to the firewall/cowl when a car was ordered with the "export package" which contained other parts that made up the package. For Mustangs there were three different forms/versions
#1- 65-66 version with equally spaced mounting holes at the firewall/cowl union point that required re-drilling of the cowl
#2- 67-70 version where the attaching holes at the cowl matched the spacing of the two individual supports they replaced if ordered with the export package
#3- 69-70 Boss 429 export brace that had the same unequal and matching attaching holes at the cowl
Of course over the years many owners have added the braces to cars originally not equipped with them such as Boss 302's or modified cars owners felt would benefit from the change
A quick picture showing the most noticeable feature the attachment hole pattern.
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Since the 65-68 Shelby's were ordered with the export package they received the same export brace that the Mustangs with the package received.
In 69 it appears in the examples I been able to find that the export cars no longer received the braces like the earlier cars and used the two piece braces. This continued through 73 or further. 69-70 Shelby cars mirror this and used the non-export two brace system.
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Additional specifications of an original was provided by one of our members in the thread below. He provided measurements of the thickness of metal (.131" gauge metal) and the distance across one of the support arms. 2.264" across
Thread -
https://www.concoursmustang.com/forum/index.php?topic=12062.msg73074#msg73074+++++++++++++++++++++++++++++++++++++++++++++++++++++
Sure we will be adding addition facts as time passes