I've recently been asked to have some carb tags made for 71 Thermoquad carburetors (specifically 4972s and 4973s) which were only used on 1971 340 engines ( on all 340 equipped A,B, & E body cars). I have seen dozens of these carbs in various conditions, swap meets, ebay, customers sent in for restoration, on survivor cars, etc. but have NEVER seen one wearing an original carb tag. I have seen them on Competition Series and other TQ's used for other later applications, just never on a 71-73 OEM MOPAR TQ. Recently 4 early road test magazines surface from 1970/71 that show 4 different cars, 2 had visible tags, 2 did not, so at least some cars had them. What I suspect is that the cars that had them were early built pre-production or Pilot cars and had pre production carbs with later built regular production cars lacking the tags.

What I am seeking is further information on the subject, any additional info or evidence etc. would be highly appreciated.

I have 2 71 cuda 340 cars, the original carb on the april 71 car has no tag at all. The september 70 build car does not either (carb was rebuilt but no reason not to keep the tag). I bet you wont find any unless the very early early cars like you said. I have been following 71 340s for a while for obvious reasons, I never seen tags.
-bob

I had a 72 340 carb I sold to a guy in canada last summer that had a tag, didn't know it was un-usual or I may have at least kept a pic.

I don't think I have any more 340 carbs in my stash but I will look just to be sure.

Never seen one, use to rebuild allot of carbs...

Never seen one also, i have 4 4973's right now, no tags, and a couple original pics of 71 340's without tags

I had three 71 340 carbs and one 72 and none had tags.Do not remember the dates on them though.

scott

i have + have had lots of the 71-4 t-quads and never recall tags or remnants of tags being on any of them

the only odditiy i had notices was 2 forms of dating on the 4972 +4973 carbs

some used the older letter=month/year ie: JO as compared to the typical t-quad dating , day of year, then year ie: 123 3

but no tags

Tags ...... ..... few and far between on any TQ from what I have seen.

sure seems to me that I have seen a few over the years... I have 20 or so TQs in the collection. I will get back to you on this.

http://www.youtube.com/watch?v=VqomZQMZQCQ&feature=related

Quote:

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the only odditiy i had notices was 2 forms of dating on the 4972 +4973 carbs

some used the older letter=month/year ie: JO as compared to the typical t-quad dating , day of year, then year ie: 123 3

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Hi Tony,

Yes I've also noticed the change in date coding the 71's. A few months ago I started recording the dates on new arrivals to see if I can learn more. I am keeping data on 72's as well and will probably expand to other years as I go. Some numbers appear to be duplicates but they were stamped with different spacing so I included them as unique.

1971's

4972S
G0 July 1970

4972S
J0 September 1970

4972S
G0 July 1970

4973S
J0 September 1970

4973S
J0 September 1970

4972S D
288 0 10/15/70

4973S D
310 0 11/6/70

4973S F
351 0 12/17/70

4872S G
011 1 1/11/71

4972S G
0461 2/15/71

4973s G
0201 1/20/71

4973S G
026 1 1/26/71

4973S G
033 1 2/2/71

4973S G
0331 2/2/71

4973S G
0341 2/3/71

1972's

6139S A
058 9 (odd stamping, probably a mis-stamp) 2/27/79??

6139S
293 10/20/??

6138S
153 2 6/2/72

6138S
2251 8/13/71

6140S
355 1 12/1/71

Competition Series

4846S = 850cfm 4847S = 1000cfm, these have press in jets.

4846/4847 “SA” models are later models with screw in jetting

4846S
3139 11/6/69

4846sa
F0 June 1970

4846sa
M0 December 1970

4847sa
D0 April 1970

Here are some Competition Series TQ tags I have, the 850's shown here.

And the 1000 CS tags.

The early Competition Series TQ's used tags to identify them and did not have numbers stamped on the base feet. These carbs were first introduced as a performance carburetor in 1969, later versions did away with the tags and had stamped feet. They also changed from a press in style jet to a screw in jet when this change was made. I suspect that when the change from tags to stamped bases to id them was made at Carter they also eliminated the tags from the 71 units they were about to supply to Chrysler as well. It's possible that a few preproduction 4972's and 4973's that had tags were supplied to Chrysler as samples etc. before they made the changeover and went into full production, TQ's were a first year item in 71 production so I'm sure they had some early in 1970 or even before for engineering and developmental purposes and that those might have had tags.

Scott is the JO date August or September? I thought it was Sep i know they left the I out so as not to get mixed up with 1.. . any sources for jets on the 4793/92's?

It's Septemeber, had a typo on my list

No jet sources yet but I'm working on that one. David (Demonsizzler) makes some jets on his lathe, you may want to ask him about that.

found this on CL, maybe its a rebuilders tag

4972S D
288 0
September 1970 (Thursday 10/15/70)

Thanks Dan, I changed it, wasn't using my 10,000 day calender, looks liked I muffed that one.

Ademon,

Do you know what year/number that carb is? I've seen them on non Mopar and later year carbs, just not 72 and prior Mopars.

Looks like a double stamp hard to make heads or tails from it. http://losangeles.craigslist.org/sgv/pts/1994464803.html looks like 6319 or 6340 both 73/340 carb numbers