Cater AFB 4 barrel identity/decode question

[Vetteophile]

Have Carter AFB 4 barrel on 63 SWC, 340hp 4 sp, built Jan 21, '63. Code on front of carb is 3461S, which is correct. But on front RH lower portion of carb is the code CD3 stamped into the body. I cant find reference to that code in the books (or I just missed it).

Can anyone tell me what this code is or what it stands for?

 

[JohnZ]

Have Carter AFB 4 barrel on 63 SWC, 340hp 4 sp, built Jan 21, '63. Code on front of carb is 3461S, which is correct. But on front RH lower portion of carb is the code CD3 stamped into the body. I cant find reference to that code in the books (or I just missed it).

Can anyone tell me what this code is or what it stands for?

I believe that the "CD3" means Revision C, April 1963.

 

[Vetteophile]

I believe that the "CD3" means Revision C, April 1963.

Thanks John Well, if you're right I'm a bit disappointed as virtually everything else on this car matches it's Jan 21 build date, and this suggests the carb is not the original.

Any other place you can think of to double check the meaning of this code?? I believe your correct it has something to do with the carbs date or date of assembly, but I'm not certain.

 

[JohnZ]

Thanks John Well, if you're right I'm a bit disappointed as virtually everything else on this car matches it's Jan 21 build date, and this suggests the carb is not the original.

Any other place you can think of to double check the meaning of this code?? I believe your correct it has something to do with the carbs date or date of assembly, but I'm not certain.

Does it have a triangular brass tag under one of the air horn screws?

 

[Vetteophile]

No. No tag on carb, so this must be a replacement carb, or maybe just the part with the "CD3" code on it.

Do you know what the 'revision' was for? Is it possible this revision required a carb update including the part with the CD3 code on it?

 

[JohnZ]

No. No tag on carb, so this must be a replacement carb, or maybe just the part with the "CD3" code on it.

Do you know what the 'revision' was for? Is it possible this revision required a carb update including the part with the CD3 code on it?

I don't know what the revision might have been; they usually related to jetting, metering rod changes, air bleed changes, choke calibration, driveability issues, etc. requested by the customer (GM). The Carter Technical Manual would describe it, but I don't have one.