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07-16-2014, 10:21 PM
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#1 |
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Registered User
Join Date: Jun 2014
Location: New Bern, NC
Posts: 177
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1971 Big Block carb number?
Can anyone with an original 1971 402 BB carb tell me the number stamped on the side? I'm not so sure I have the original carb for mine. I thought the number for an older GM vehicle started with a *70* instead of a *170*. Pictures?
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1971 Cheyenne Super - Factory Big Block - Second (1987-89) & Fourth (2014-) Owner - To be restored 1978 Turbo Malibu - Owned since 1986 1987 Grand National Aerocoupe -1 of 1 1988 LeSabre T-Type - Supercharged |
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07-16-2014, 10:36 PM
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#2 |
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Registered User
Join Date: Feb 2013
Location: Upland, Calif
Posts: 698
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Re: 1971 Big Block carb number?
I believe the "170" sequence started in 1976.
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1957 CHEVY 1/2 TON SHORT BED 1940 FORD 1/2 TON SHORT BED |
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07-17-2014, 12:06 AM
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#3 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,736
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Re: 1971 Big Block carb number?
Get your carb number and look here to see if it's listed.
http://www.digitalcorvettes.com/foru...ad.php?t=88376 |
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07-17-2014, 01:12 AM
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#4 |
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Registered User
 
Join Date: May 2009
Location: Walla Walla, WA
Posts: 327
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Re: 1971 Big Block carb number?
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07-17-2014, 01:40 PM
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#5 |
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Registered User
Join Date: Nov 2012
Location: Atlanta
Posts: 553
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Re: 1971 Big Block carb number?
My 1971 Super has it original quadrajet carb. The number is 7041209. The truck is an Atlanta built factory BB/auto. The info in the service manual supports this number . I will post a pic later if you would like. Are you wanting to go back original?
Mike Ps. I'm not trying to step on any toes, but you will probably see info stating that auto transmissions must have even numbered carbs, i.e. 7041208. That is not correct, at least in this case. I will post a copy of the page out of the service manual if I can find it. Last edited by Mike's money pit; 07-17-2014 at 01:46 PM. Reason: Added info |
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07-17-2014, 02:07 PM
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#6 |
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Registered User
Join Date: Nov 2012
Location: Atlanta
Posts: 553
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Re: 1971 Big Block carb number?
Here is a link to a previous thread that covers this exact question. The document I was referring to is pictured in that thread.
http://67-72chevytrucks.com/vboard/s...d.php?t=612718 Here is a pic (lifted from SSTim's post) |
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07-17-2014, 06:43 PM
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#7 |
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Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: 1971 Big Block carb number?
If you don't have them at least download copies of the factory service and overhaul manuals. They are a great back to basics reference.
RTFM ... Read The Factory Manuals... download 'em here
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Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban |
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07-18-2014, 03:41 PM
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#8 |
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Registered User
Join Date: Jun 2014
Location: New Bern, NC
Posts: 177
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Re: 1971 Big Block carb number?
Looks like I don't have an original carb. The guy said the carb I have was already on the truck when I sold the truck to him back in 1989. *I* might have put another carb on the truck when I owned it back in the 80's. I don't remember though.
Thanks for the replies and the shop manual info...very valuable information.
__________________
1971 Cheyenne Super - Factory Big Block - Second (1987-89) & Fourth (2014-) Owner - To be restored 1978 Turbo Malibu - Owned since 1986 1987 Grand National Aerocoupe -1 of 1 1988 LeSabre T-Type - Supercharged |
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