I have multiple 65-66 cars and almost all have the 1965 429 Carter AFB 3904 carb. A couple have Rochester's. I try to stick with Carters as I have a couple Carters rebuilt, and slightly easier to change on other cars if needed, or for troubleshooting. I was looking in my 40' storage container for a 429 W/O AC Carter AFB 4168 carb to rebuild and put on my '66, but could only find more 3904s. Most have date codes ending in 4 or 5.
I then zoomed in to an old pic of my '66 during disassembly, and sure enough the orig carb on it when I bought was 3904. Some low mileage cars I have, the carbs with the TR bolts look like were never removed.
Bottom line, could the factory have used 3904s in some of the 66s too? Not a big deal, but restoring '66 to original and I didn't know if there were any differences in 3904 vs 4168. Any?
Oh, I accidentally send my rebuilder a 1966 429 With AC (A.I.R.) Carter AFB 4171. He only disassembled so far, and I asked him to wait before going any further. What is the difference in the AIR carb (California emissions carb)? I will probably sell the AIR carb.
Thanks, Chuck
Chuck,
The difference between the AIR carb and the standard carb is in the metering rods and the primary clusters.
Greg Surfas
Greg,
I saw this post about 65/66 carbs and thanks again for selling me the two rebuilt 1966 Cadillac carbs you had. I installed the second one on a 65 Cadillac this week, and it was a nice success.
Glad to hear it Scott.
Quote from: "Cadillac Kid" Greg Surfas 15364 on February 15, 2018, 10:41:56 AM
Chuck,
The difference between the AIR carb and the standard carb is in the metering rods and the primary clusters.
Greg Surfas
Thanks for the info! Chuck