Author Topic: 66 GT350 Side Scoop Running Changes  (Read 4935 times)

Offline J_Speegle

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66 GT350 Side Scoop Running Changes
« on: May 15, 2019, 05:05:32 PM »
Slowly going through the running changes related to just the Shelby components of these cars

http://www.concoursmustang.com/forum/index.php?topic=19062.msg120306#msg120306

There is a separate thread that focuses on the Ford running changes for 66 also for those details.

So thought it would help if we looked at the running changes related to the side scoop installation for 66 GT350's. Because of how these cars were titled this would include the carry over 66's also but that should not rally confuse things as long as we keep it in mind. As always with early Shelby production we must remember that cars were not always finished in sequential order so the change over points may never be exact but we can consider an appropriate range to help owners and builders choose the most likely option if they don't have original parts to guide them.

#1 - Color of the ducts. In the early cars Shelby used duct ends molded of a whitish material then changed, fairly early, to a black molded plastic duct ends.  Currently I've found the change took place some where between approx 6S050 and 6S280.




Then to the blackish finish




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#2 - Inside or outside attachment. On the majority of the cars the dusts were attached so that the mounting lips were located on the interior of the car as shown in the pictures below.







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On late cars the ducts were inserted from the outside through the holes then attached to the body as shown in the pictures below.  You will also notice that the rivets are now facing the other direction, inward, since the installer was now on the outside of the car rather that inside like the earlier installation




Appears that they used ALLOT more rivets installing them from this direction.  ::)



Current have found #2 change took place somewhere between approx 6S2020 and 6S2070
« Last Edit: December 30, 2022, 05:22:04 PM by J_Speegle »
Jeff Speegle

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Offline J_Speegle

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Re: 66 GT350 Side Scoop Running Changes
« Reply #1 on: April 22, 2020, 07:12:40 PM »
Another finding that has appeared after study is that when they changed to the exterior mounted scoop duct ends the number of retaining rivets in the wheel well increased in numbers. Possibly due to there being no guide depressions as there are on the reverse side of the end. One example of this is in the pictures posted above
Jeff Speegle

Anything worth doing is worth doing concours ;)

Offline J_Speegle

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Re: 66 GT350 Side Scoop Running Changes
« Reply #2 on: March 02, 2023, 05:44:10 PM »
Posting a few more examples of both internally and externally attached scoop duct as well as the retaining rivets since I was posting these pictures elsewhere


Earlier style




Later style



Wheel well attached duct was installed the same way (internal or external as well as rivet direction) as the side scoop arrangement
Jeff Speegle

Anything worth doing is worth doing concours ;)

Offline Road Reptile

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Re: 66 GT350 Side Scoop Running Changes
« Reply #3 on: April 20, 2024, 11:59:47 AM »
Hi all 66 fans,
Just a question does anyone know where to get duct hose? If so please advise. Appears to be the same cloth wrapped steel coil with 3" i.d. if anyone has a car apart could you measure and confirm dimentions. Thanks in advance!!
Regards R.R.  8)

Offline RoyceP

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Re: 66 GT350 Side Scoop Running Changes
« Reply #4 on: April 20, 2024, 12:51:42 PM »
Looks like Shelby was buying aircraft Skeet hose locally and using it in his cars. That stuff used to be sold in either black or red. Lately I have only seen the red stuff available, for example Aircraft Spruce sells it.


Interesting. 
1968 W code 427 Cougar XR-7 GTE Feb 23 Dearborn C6 / 3.50 open
1968 R code 428CJ Cougar XR-7 May 13 Dearborn C6 / 3.91 T - Lock

Offline Road Reptile

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Re: 66 GT350 Side Scoop Running Changes
« Reply #5 on: April 20, 2024, 06:33:13 PM »
Thanks for the response!!
R.R.