Rochester Quadrajet Carb Numbers - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69 COPO · 01-05-2009, 03:44 PM

Does anyone know the correct numbers for a 4 barrel Rochester Quadrajet Carburetor for 71-72 Chevy Cheyenne Pickup. Thanks

stllookn · 01-05-2009, 04:02 PM

Casting number 704xxxx according to my Rochester book. 4th digit will be 1 or 2 for last year and 6th digit will be 0,1 or 2 for Chevrolet. They call these casting numbers but they are actually stamped into the side of the carb.

BradE · 01-05-2009, 04:40 PM

If you are looking, I know where you can find one

**too much stuff** · 01-05-2009, 05:03 PM

It will probably change with engine size and trans combo.

dfwright · 01-05-2009, 10:35 PM

There is a great chart explaining the casting numbers at Cliffs High Performance Quadrajets --- http://www.cliffshighperformance.com...carb_ID_2.html

68 50th · 01-06-2009, 04:24 AM

Here's a list for 72 truck carbs from the 1972 10-30 Series Truck Service Manual.
Also a pic of my 72 BB Rochester.

**SOUTHERN917** · 01-06-2009, 10:15 AM

I used this site when I did my rebuild. Lots of pics, and great customer service. http://WWW.Carburetor.ca/carbs/tech/...jet-index.html but you will still need to find #. Mine was on drivers side behind throttle linkage.

69 COPO · 01-06-2009, 09:26 PM

Thanks for the help. I'll check my carb tomorrow for the numbers.

01-05-2009, 03:44 PM	#1
69 COPO Registered User Join Date: Feb 2005 Location: S.E. South Dakota Posts: 161	Rochester Quadrajet Carb Numbers Does anyone know the correct numbers for a 4 barrel Rochester Quadrajet Carburetor for 71-72 Chevy Cheyenne Pickup. Thanks

01-05-2009, 04:02 PM	#2
stllookn Saving 1 truck at a time! Join Date: Aug 2001 Location: Kent, WA Posts: 6,465	Re: Rochester Quadrajet Carb Numbers Casting number 704xxxx according to my Rochester book. 4th digit will be 1 or 2 for last year and 6th digit will be 0,1 or 2 for Chevrolet. They call these casting numbers but they are actually stamped into the side of the carb. __________________ '68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary) Last edited by stllookn; 01-05-2009 at 04:04 PM.

01-05-2009, 04:40 PM	#3
BradE yard boy Join Date: Sep 2007 Location: Franklin, TN Posts: 119	Re: Rochester Quadrajet Carb Numbers If you are looking, I know where you can find one __________________ 1984 Chevy c20

01-05-2009, 05:03 PM	#4
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,786	Re: Rochester Quadrajet Carb Numbers It will probably change with engine size and trans combo. __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

01-05-2009, 10:35 PM	#5
dfwright Registered User Join Date: Jan 2009 Location: San Antonio, Texas Posts: 1,374	Re: Rochester Quadrajet Carb Numbers There is a great chart explaining the casting numbers at Cliffs High Performance Quadrajets --- http://www.cliffshighperformance.com...carb_ID_2.html

01-06-2009, 04:24 AM	#6
68 50th Senior Member Join Date: Jul 2004 Location: Sweden Posts: 833	Re: Rochester Quadrajet Carb Numbers Here's a list for 72 truck carbs from the 1972 10-30 Series Truck Service Manual. Also a pic of my 72 BB Rochester. Attached Images __________________ Mats.. ---------------------------------------------------- 1971 Cheyenne Super Custom Camper 475CBB/TH400/AC 1992 Silverado Sport Truck 1988 Silverado 2500 Ext Longbed 4x4 2001 GMC Sierra SLT 4x4 1990 Chevrolet K3500 1965 Pontiac Grand Prix 1980 Z 28 350/4-speed/AC/T-top 1980 Camaro Coupe V6/3-speed 1979 Buick Century Wagon

01-06-2009, 10:15 AM	#7
SOUTHERN917 Wrench Wench Join Date: Apr 2008 Location: HERRIN, IL Posts: 93	Re: Rochester Quadrajet Carb Numbers I used this site when I did my rebuild. Lots of pics, and great customer service. http://WWW.Carburetor.ca/carbs/tech/...jet-index.html but you will still need to find #. Mine was on drivers side behind throttle linkage. __________________ If everyone had good taste, who would buy all the FORDS? Women join us!! BUSTED KNUCKLE BABES "Face it girls, I'm older and have better insurance" -Fried green tomatoes

01-06-2009, 09:26 PM	#8
69 COPO Registered User Join Date: Feb 2005 Location: S.E. South Dakota Posts: 161	Re: Rochester Quadrajet Carb Numbers Thanks for the help. I'll check my carb tomorrow for the numbers.



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