carb id?

724x4 · 04-04-2008, 01:53 PM

fixin to get the old 72 gmc running...took a look under the hood to see what all i need thanx to years of sittin in the field with rats munchin on hoses and wiring and took a look at the carb...its a Qjet but its a carter....was wondering if this is the original carb on the engine, never saw stamping on the side of the body like it before, said made for GMC by the Carter carburator company......the number on it is 7043202...was wondering if anyone could tell me what model carb i have...if it was original equipment...gonna try to find a kit for it so i can turn her over and see if the old beast fires

03chevy · 04-04-2008, 02:19 PM

i found this for you and yes gmc did have carters on them. hope this helps you alittle

Carter built quadrajets: Carter Carburetor Company of St. Louis produced millions of quadrajets under license from GM from 1966 through 1979. These carburetors carry the exact same identification as their Rochester counterparts, and parts are directly interchangeable. Carter also produced "aftermarket" replacement quadrajets, which will be identified by the traditional Carter part number (4 digits, followed by the letter "S"). An example of this numbering system would be 4675S, which is identical except for the number to 7028262.

crabtruck · 04-05-2008, 04:14 AM

I thought Rochester made these 4MV's for 1973 ?, maybe I'm wrong.
Various 4MV's were used 1970-78 on the 350's

Anyway the specs I saw for the 7043202,(and -03, -10, -11) were:
float=7/32,accel=13/32,rod=0.430,vac=0.215,unloader=0.450,air vlv=0.020

1972 4MV #s were 7042xxx =>206,207,208,210,211,218,219,910,911
that all seem pretty similar as a group but way diff than the 73's to me
but I don't know bubba about carbs, so large grain of salt.
Hope something here was useful...

75K30 · 04-05-2008, 09:39 AM

This can be a real pain, but Carter did manufacture identical carbs.
Instead of getting real deep into this, since they are identical, I have always used repair / re-build kits for the Rochester on anything resembling a Q-jet.
Here is a link that can help you identify your "mixer" and perhaps get you down the road.
http://www.carburetion.com/Questions/QandA.htm
As long as I am typing here, I might suggest simply replacing the carb, and updating it to something a little more current.
Perhaps a new / re-built q-jet, or even something along the lines of a Holley truck avenger. The Avenger will require an adapter, or different intake since it is a square bore, but they work well, and a new intake will provide a bit more performance, as will the carb itself.

04-04-2008, 01:53 PM	#1
724x4 Full Member Join Date: Nov 2007 Location: TX Posts: 21	carb id? fixin to get the old 72 gmc running...took a look under the hood to see what all i need thanx to years of sittin in the field with rats munchin on hoses and wiring and took a look at the carb...its a Qjet but its a carter....was wondering if this is the original carb on the engine, never saw stamping on the side of the body like it before, said made for GMC by the Carter carburator company......the number on it is 7043202...was wondering if anyone could tell me what model carb i have...if it was original equipment...gonna try to find a kit for it so i can turn her over and see if the old beast fires

04-04-2008, 02:19 PM	#2
03chevy Senior Member Join Date: Dec 2006 Location: jax,fl Posts: 1,052	i found this for you and yes gmc did have carters on them. hope this helps you alittle Carter built quadrajets: Carter Carburetor Company of St. Louis produced millions of quadrajets under license from GM from 1966 through 1979. These carburetors carry the exact same identification as their Rochester counterparts, and parts are directly interchangeable. Carter also produced "aftermarket" replacement quadrajets, which will be identified by the traditional Carter part number (4 digits, followed by the letter "S"). An example of this numbering system would be 4675S, which is identical except for the number to 7028262. __________________ A dirty mind is a terrible thing to waste!

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04-05-2008, 04:14 AM	#3
crabtruck Senior Member Join Date: Jul 2007 Posts: 1,474	I thought Rochester made these 4MV's for 1973 ?, maybe I'm wrong. Various 4MV's were used 1970-78 on the 350's Anyway the specs I saw for the 7043202,(and -03, -10, -11) were: float=7/32,accel=13/32,rod=0.430,vac=0.215,unloader=0.450,air vlv=0.020 1972 4MV #s were 7042xxx =>206,207,208,210,211,218,219,910,911 that all seem pretty similar as a group but way diff than the 73's to me but I don't know bubba about carbs, so large grain of salt. Hope something here was useful...

04-05-2008, 09:39 AM	#4
75K30 Senior Member Join Date: Jul 2006 Posts: 2,627	This can be a real pain, but Carter did manufacture identical carbs. Instead of getting real deep into this, since they are identical, I have always used repair / re-build kits for the Rochester on anything resembling a Q-jet. Here is a link that can help you identify your "mixer" and perhaps get you down the road. http://www.carburetion.com/Questions/QandA.htm As long as I am typing here, I might suggest simply replacing the carb, and updating it to something a little more current. Perhaps a new / re-built q-jet, or even something along the lines of a Holley truck avenger. The Avenger will require an adapter, or different intake since it is a square bore, but they work well, and a new intake will provide a bit more performance, as will the carb itself.