SAAC Forum

The Cars => 1969-1970 Shelby GT350/500 => Topic started by: jimhyc on July 21, 2025, 12:08:44 PM

Title: ‘69 GT500 auto vacuum advance unit.
Post by: jimhyc on July 21, 2025, 12:08:44 PM
The diagram on my advance unit (single) is shot and needs to be replaced. Does anyone know of a replacement that looks original? I've checked out a few online and they don't look anything like the original design.  Thanks...
Title: Re: ‘69 GT500 auto vacuum advance unit.
Post by: Coralsnake on July 21, 2025, 12:20:37 PM
You will need to find a NOS unit or have it rebuilt
Title: Re: ‘69 GT500 auto vacuum advance unit.
Post by: FL SAAC on July 21, 2025, 04:01:47 PM
Quote from: jimhyc on July 21, 2025, 12:08:44 PMThe diagram on my advance unit (single) is shot and needs to be replaced. Does anyone know of a replacement that looks original? I've checked out a few online and they don't look anything like the original design.  Thanks...


You have two options

1 - mechanically advance it as much as you
     can, then put in a b.b. to plug up
    the vacuum and it looks stock

2 - contact Jim Woods to have it rebuilt

     jimwoods7@outlook.com

Best of luck !
Title: Re: ‘69 GT500 auto vacuum advance unit.
Post by: cob428 on July 21, 2025, 05:35:48 PM
Quote from: FL SAAC on July 21, 2025, 04:01:47 PM
Quote from: jimhyc on July 21, 2025, 12:08:44 PMThe diagram on my advance unit (single) is shot and needs to be replaced. Does anyone know of a replacement that looks original? I've checked out a few online and they don't look anything like the original design.  Thanks...


You have two options

1 - mechanically advance it as much as you
    can, then put in a b.b. to plug up
    the vacuum and it looks stock

2 - contact Jim Woods to have it rebuilt

    jimwoods7@outlook.com

Best of luck !

I second the Jim Woods statement, fantastic person and knowledgeable.

Pete
Title: Re: ‘69 GT500 auto vacuum advance unit.
Post by: rockhouse66 on July 21, 2025, 07:36:09 PM
Sorry to disappoint my supporters (thanks guys!!) but I can't do the single advance units; only the dual ones.  I know Brian McDevitt does these single ones and I don't know who else.

There are generic aftermarket units that look identical to the originals.  I guess you would call them NORS?  The Autolite logo on the originals is on the back side under where it mounts and almost impossible to view when installed, so the NORS ones are a good option.  There are some on eBay.  Expect to pay $100 - $200 for one I think - and take a close look at how the plating looks before purchasing.  Search for DD-190, which is the ID number.
Title: Re: ‘69 GT500 auto vacuum advance unit.
Post by: FL SAAC on July 21, 2025, 11:10:56 PM
Here are some others that maybe still rebuilding them.

Brian McDevitt
fordmuscleparts@roadrunner.com
Phone number 740-922-9680

Or

Tim O'Connor tim@428cobrajetcars.com
Title: Re: ‘69 GT500 auto vacuum advance unit.
Post by: jimhyc on July 22, 2025, 05:31:25 AM
Thanks for all the input...
Title: Re: ‘69 GT500 auto vacuum advance unit.
Post by: FL SAAC on July 22, 2025, 12:03:17 PM
JC just sent this to me

This one is on Ebay

This is a used original but rebuilt vacuum advance, used on the cobra jet cars (hp6) rebuilt too factory specs, both sides hold vacuum and ready to be used.

Possibly you can contact this individual and ask if they rebuild them.  Then you could reuse yours

Best of luck on your journey
Title: Re: ‘69 GT500 auto vacuum advance unit.
Post by: Coralsnake on July 23, 2025, 12:55:27 PM
Here is the correct one :

https://www.ebay.com/itm/116700860231?fits=Year%3A1965%7CModel%3AMustang&_skw=nos+1965+mustang&epid=24018728494&itmmeta=01K0W38824TE50QRR1DN2A8P2Q&hash=item1b2be9cf47:g:jAEAAeSwh65oftXY&itmprp=enc%3AAQAKAAAA0FkggFvd1GGDu0w3yXCmi1cs8YMDl%2B4wS36QGafp7kTVRIIAEpggKRm8bMMIZgPhZxEXfPVPO4ckEVBLHw%2FMvv4axbU9gpyAEq6ft1WeCu2acIcAhbpUWHvD%2BS5LDBYPBo5Zi%2FcNrwXdsdjBJwKLzF6uunJpkxONhllsfuJa%2B5v89DDPs2yAFR0fGAVd7oicZYZkfzDTYybDjyOkLvv9ZSygJWUaq4VKX%2Ff4OQlpuXr4vNNS5v3GmyttQtyV%2FBO7ikL74ANM2UExnPnRVL4PNMs%3D%7Ctkp%3ABk9SR7iBoYOHZg
Title: Re: ‘69 GT500 auto vacuum advance unit.
Post by: TLea on July 23, 2025, 02:49:17 PM
My goodness I remember buying those all day long for $20-30. Dating myself again
Title: Re: ‘69 GT500 auto vacuum advance unit.
Post by: Coralsnake on July 23, 2025, 02:55:47 PM
You can find them cheaper. Just didnt want anyone to get confused with the incorrect information in this thread