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Title: 1968 shelby dist vac advance.
Post by: shlb69 on July 24, 2019, 11:02:07 PM

What is the correct part number for a 68 gt350 4 spd vac advance for the distributor. ALso what is the DD part #

Title: Re: 1968 shelby dist vac advance.
Post by: TLea on July 25, 2019, 08:44:08 AM

C8AZ 12370 A
sorry don't know DD#

Title: Re: 1968 shelby dist vac advance.
Post by: shlb69 on July 25, 2019, 12:58:09 PM

Thanks tim is there any markings on it like x 12, z or a12?

Title: Re: 1968 shelby dist vac advance.
Post by: Dizzy on July 25, 2019, 02:43:00 PM

Should be A12,narrow silver band. The X12 and Z12 are the dual point type with wider,gold band.

Title: Re: 1968 shelby dist vac advance.
Post by: 68blk500c on July 26, 2019, 10:51:58 PM

May be mute by now, but trying to look up DD# for you; what is the dist. ID #?

Title: Re: 1968 shelby dist vac advance.
Post by: Coralsnake on July 27, 2019, 04:55:23 PM

The distributor is marked C8ZF-12127-A. It will have a dual style vacuum advance

Title: Re: 1968 shelby dist vac advance.
Post by: shlb69 on July 27, 2019, 10:22:53 PM

does this look right

Title: Re: 1968 shelby dist vac advance.
Post by: shlb69 on July 27, 2019, 10:23:41 PM

and this

Title: Re: 1968 shelby dist vac advance.
Post by: Chris Thauberger on July 27, 2019, 10:28:42 PM

Is that a service part?

I thought the front vacuum nipple threaded into the housing?

Title: Re: 1968 shelby dist vac advance.
Post by: 68blk500c on July 27, 2019, 10:32:17 PM

Per MPC, the C8ZF-A should use a DD#307 diaphragm unit. CORRECTED POST

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