With the price of these things I want to be sure I get exactly what I need... 1968 GT 350 4speed. Built 4-23-68.
* Correct Carb: S8MS-9510-C OR Autolite C8ZF-C. Is one more correct or desirable than the other?
* Date: I assume 833,834,841,842 any of these would be correct?
* Part number and date is on the carb horn and/the tag if still on it?
* What is LIST- ####? Do I care about this number?
Am I missing anything else? Any beware of XYZ?
Thanks!!!!!
Are you representing as factory install or recall? Your build date could probably be either
Either carb is correct. The car came with the Autolite, the dealer may have installed the Holley. Correct is in the eye of the beholder or the guy with the paperwork
The three digit codes are for the Holley carbs only.
A list number is a Holley code and it is directly related to the S8MS stamped on the carb air horn.
Autolite carbs are stamped on the base plate
Over the counter Holley replacement carbs can have the correct list number and date code but no Shelby part number.
thanks guys. What about the date codes? I assume 833,834,841,842 any of these would be correct?
Pete what do you mean by paper work? I have build sheet is there something on that I should be aware of in this case?
Warranty records might indicate a change.
Build sheets certainly would not
thanks.. and the dates?
The Autolite would be before the car, typically the Holley would be slightly before or after the campaign notice
perfect. and the dates ive suggested within 30 days of build would be most correct for the Autolite? Thanks
If installed as recall Holley date could be well over a year after build date
Where is the Autolite date code? Just on the tag or elsewhere on the body? thanks
Autolite dates just on tag?
Quote from: hurlbird on January 18, 2021, 08:25:50 PM
Where is the Autolite date code? Just on the tag or elsewhere on the body? thanks
Depends on if you're looking to see when an individual part of the carburetor was cast or when the carburetor was assembled. Likely for your purposes your looking at assembly date then comparing it to the casting to make sure casting dates(s) are prior to the assembly date and you don't have a Frankenstein throw together carburetor.
yes assembly date. Is that just on the tag for the Autolite or elsewhere too? thanks
Quote from: hurlbird on January 20, 2021, 04:46:03 PM
yes assembly date. Is that just on the tag for the Autolite or elsewhere too? thanks
That is the only place I recall it being marked on those carbs that year
Great thanks so much that was key for me as I am going to go with an Autolite for my car.
Quote from: hurlbird on January 20, 2021, 07:01:22 PM
Great thanks so much that was key for me as I am going to go with an Autolite for my car.
The Autolite may be easier and less expensive to find however many find them hard to get to run properly compared to a Holley.
Quote from: Bob Gaines on January 20, 2021, 08:47:55 PM
The Autolite may be easier and less expensive to find however many find them hard to get to run properly compared to a Holley.
+1, they are difficult to work on. Had an NOS C8Z out of the box, ran nice for a few weeks and then started acting up.
good to know. I would have anything gone through professionally for sure.