Holley dashpot question

[6T6/7]

Are the '66s with automatic trans and Holley 715  supposed to have a dashpot?  I've heard that the '67 automatics that came through with the Holley 715 included a dashpot.  Wondering if similar for the '66s.
Thanks

[NC TRACKRAT]

To my limited knowledge, all '66 GT350's with the C3 automatic tranny came with AUTOLITE C6ZF-F carburetors which were equipped with dashpots.  Some owners along the way may have elected to swap them out for a Holley.

[427hunter]

I thought the Holley to Autolite change over for auto's was some point between 8-900?

[texas swede]

In a letter I have from SA all cars from 6S801 with Automatics would have the Autoliye.
Texas Swede

[gt350hr]

   The S2MS 9510 A Holley did not have a dash pot and SAI did not add them. I have an early C4 auto Hertz car that came with the Holley and no dashpot. The Autolite 4100 , C6ZF-C WAS produced with a dashpot  by Ford and the complete carburetor was transferred by SAI during the manifold swap.

     PS new ( to me) information and discussion may alter my statement above with respect to '67 usage! AND yes I called out the "C" incorrectly , I should have said F , I apologize for the confusion on my part.

[Bob Gaines]

   The S2MS 9510 A Holley did not have a dash pot and SAI did not add them. I have an early C4 auto Hertz car that came with the Holley and no dashpot. The Autolite 4100 , C6ZF-C WAS produced with a dashpot  by Ford and the complete carburetor was transferred by SAI during the manifold swap.

Randy,the S2MS 9510 A's that were used on some 67 GT350 automatic cars had the dashpot. I have heard some anecdotal stories about some late 66 GT350 automatics using the Holley which I have never been able to substantiate. If that were true (which I have never confirmed)I would not be surprised if they had the dash pot like the ones used on the 67's . Hopefully others may more info.

[gt350hr]

    Bob ,
       It's possible it was a retro fit. if the "spec" was changed to Holley , they would have been on service carbs. In "my years" I have seen one or two 715s with the natural finish , 4100 style dashpot ( the one with the external spring) for sale at local swap meets. I didn't/don't feel they were original . Remember "My" vision is somewhat limited to California stuff. What have you seen? I haven't "seen it all". LOL
   Randy

[Bob Gaines]

    Bob ,
       It's possible it was a retro fit. if the "spec" was changed to Holley , they would have been on service carbs. In "my years" I have seen one or two 715s with the natural finish , 4100 style dashpot ( the one with the external spring) for sale at local swap meets. I didn't/don't feel they were original . Remember "My" vision is somewhat limited to California stuff. What have you seen? I haven't "seen it all". LOL
   Randy

I assume it was done at the Cleveland engine plant.Yes it was the one with the spring.I have never seen them on later service carbs. The dashpot is the only distinguishing factor to tell if a original Holley on a 67 auto GT350 or a retrofit from what I can tell. FYI not all 67 GT350 autos got the Holley .Most got the Autolite carb.

[gt350hr]

 We need to look at DSO sheets to see if there is a call out for a different engine build number. The engine plant would certainly have a different "code" for an Autolite equipped complete engine versus one with a Holley same as they did for a thermactor engine versus one without. They were FAR more restricted as to what they assembled. I'm thinking the Holley was an SAI thing and while being swapped the "Autolite dashpot" was transferred at the same time. Autolite parts lacked the dichromate plating Holley parts were known for.
   The late Ray Wolfe had boxes ( at least two hundred lines)  of '67 small block Holley fuel lines after SAI closed down.
    Randy

[S7MS427]

The Autolite 4100 , C6ZF-C WAS produced with a dashpot  by Ford and the complete carburetor was transferred by SAI during the manifold swap.

Randy,

Just to make sure that there is no confusion, the C6ZF-C carburetor did not use a dashpot.  That Hi-Po carb was for manual transmission cars.  What you are thinking of is the C6ZF-F that was installed on automatic transmission Hi-Po cars.

[texas swede]

This 3259 carburetor was for sale in Sweden some years ago and was told to have come off a 67 GT350 with an automatic.
Texas Swede

[427hunter]

At saac 42 I looked at un unrestored non hertz 66 auto car that had a holley, it was in the 900's so who knows exactly when they stopped.

[Bob Gaines]

This 3259 carburetor was for sale in Sweden some years ago and was told to have come off a 67 GT350 with an automatic.
Texas Swede

When i see them (rarely) that is how the dashpot is attached. attaching hardware is a clue if genuine or contrived.

[JD]

This 3259 carburetor was for sale in Sweden some years ago and was told to have come off a 67 GT350 with an automatic.
Texas Swede

When i see them (rarely) that is how the dashpot is attached. attaching hardware is a clue if genuine or contrived. ;)

Another 67 GT350 auto - SJ build date early Nov., '66, SA completion date early Dec, '66,  Carb date 674 ('66, July, 4th week).

[gt350hr]

   I do have one of the "natural finish" dashpots in my bin of "3259" parts. I may have removed it because I thought it wasn't correct from one of the '67 carbs I've owned. I know I have never seen one on a '66.
  I should have been more careful on reply #4 and again apologize.