Author Topic: what kind of carb on your 350??  (Read 198 times)

Offline fiddler

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  • 74 Chevy C10 Stepside
what kind of carb on your 350??
« on: September 14, 2018, 04:44:28 PM »
so I have a 1974 chevy C10 stepside with a 350.  It has an edelbrock carb on it.  I am filtering the fuel 3 times with the final stage being a 10 micron aircraft fuel filter.  The idle jets repeatedly plug necessitating a carb cleaner and blow out of the ports.  (Probably monthly)  Edelbrock has a youtube on how to do this for the carb.  I am wondering what brands of carbs most of you are using.  This is a turbo 400 automatic transmission if it makes a difference.  (At least thats what the guy who sold me the truck a few years back told me).  Also...I only drive it about 50 miles a week.  4 to trips of 1 mile to take my bicycle down to the flat and once to town (34 miles round trip).   
Ricky

Offline Rapid Roy

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  • Euless, Texas
Re: what kind of carb on your 350??
« Reply #1 on: September 14, 2018, 06:22:14 PM »
I have the OEM Carter (Rochester) #7044202. Type R4-4MV Quadrajet.

http://www.carburetion.com/CarbNumber.asp?Number=7044202

Rebuilt July 2017.
1974 Cheyenne 10 LWB 350/TH350/AC/4 BBL Quadrajet

Offline Deaddawg58

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  • Cleburne,Texas
Re: what kind of carb on your 350??
« Reply #2 on: September 14, 2018, 08:10:27 PM »
HOLLEY – STREET AVENGER 4-BARREL CARBURETOR 670 cfm model 4150
1977 k20 350/350 np205

Offline fiddler

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  • 74 Chevy C10 Stepside
Re: what kind of carb on your 350??
« Reply #3 on: September 14, 2018, 08:53:06 PM »
 :) 
thanks for the input.  Certainly food for thought.   Maybe a good stock carb would take less tinkering......
Ricky

Offline Henry

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Re: what kind of carb on your 350??
« Reply #4 on: September 15, 2018, 10:58:23 AM »
Hi Fiddler:
My 76 C-20 has the OEM Rochester 4MV Q-jet on it with the divorced choke. I think it was the best and simplest 4-bbl carb GM made for the trucks.
Regards,
Henry
PS: your trans is a T400 if the pan has the shape of a "fat state of Texas". It is a T350 if the pan is square with a chamfer on one corner...gotta get on your back to find out.

Offline fiddler

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  • 74 Chevy C10 Stepside
Re: what kind of carb on your 350??
« Reply #5 on: September 15, 2018, 04:13:32 PM »
Thanks for the input.So the next time I am under there I will check that transmission out.  Good information to have...  I am thinking from these responses that the OEM carb would be my best bet.  Probably a new one would be made of unobtainium so maybe I can find a good re manufactured one.
Ricky

Offline VileZambonie

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Re: what kind of carb on your 350??
« Reply #6 on: September 15, 2018, 08:30:37 PM »
Did you remove the sock filters? What model # are you running?
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Offline 75gmck25

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  • 1975 GMC K25 Camper Special, 350/TH350/NP203
Re: what kind of carb on your 350??
« Reply #7 on: October 11, 2018, 12:40:35 PM »
If you are plugging up jets that fast, the rubber hoses after the filters may be deteriorating.    I don't know how any gas tank contamination could be getting through your combination of filters.

Its quite a bit more expensive, but you should use SAE J30R9  fuel injection hose (or even J30R7 carburetor hose)to replace any suspect rubber hoses.   It will hold up to the ethanol in modern gas much better than the older materials.

For my '75 GMC I upgraded my '75 Quadrajet to an '86 Quadrajet (17080213), which was the last carburetor used on trucks before they added any electric or electronic controls.  I found it on an '86 Chevy 1 ton pickup in the junkyard, and rebuilt it with a kit from Cliff Ruggles.  I also replaced the throttle shaft bushings.

Bruce

Offline bigben5054

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Re: what kind of carb on your 350??
« Reply #8 on: October 13, 2018, 12:14:10 PM »
I also have the Holley Street Avenger 670cfm model 4150.  But I just bought this truck and need to go through the carb.  Its all messed up.  When I was in high school I bought a rebuilt Q-jet from Autozone for my '73 350 and I've never had one as nice as that one did.