Will a factory 4bbl manifold bolt on in place of a 2bbl? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Ironangel** · 10-23-2010, 02:59 PM

I have a factory stock 350ci w/factory 2bbl intake on a 72 C-10. I was given a 350ci 4bbl manifold and was wondering if they would swap out or if the heads and/or ports are different? I ran into this problem years ago with a Ford Cleveland 351 and the heads were different from 2bbl to 4bbl manifolds. Thanks!

islandboy312 · 10-23-2010, 03:07 PM

That's the cool thing about Chevys, great interchangability. As long as it's from the same generation of engine, (1955 to late 80's), it'll fit fine. Linkage and choke are the only issues you might have.

rayfinseats · 12-11-2010, 02:31 AM

Pre 86 and after 86 are the main differences. If it looks like it will fit it will. Watch the bolts to the heads. You can see the difference. The newer engines have center bolt valve covers.

Jacfourteen · 12-11-2010, 04:04 AM

Yep, if its off the same era engine it will bolt up fine.

matthew20061 · 12-11-2010, 05:07 AM

Quote:

Originally Posted by Jacfourteen

Yep, if its off the same era engine it will bolt up fine.

Gotta love chevy!

72freak · 12-11-2010, 06:59 AM

Just make sure the manifold matches whatever carb CHOKE set up you want to use, that you have the correct carb adapter plate and once you swap it all make sure its not too tall. I have always been a fan of swapping to the front oil fill tube types like found on the 327 and some early 307's.

rsavage · 12-11-2010, 08:04 AM

If it is a correct quadrajet manifold for our year trucks it will have a divorced choke set up on the passenger side and no egr valve provision on the driver's side. If it doesn't have a carb with it and you want to use what came on it, you will have to look for a quadrajet that has the divorced choke. You can find them on the parts board or on ebay and it should get a rebuild kit before you put it on.

10-23-2010, 02:59 PM	#1
Ironangel Senior Member Join Date: Feb 2010 Location: Falls City, Nebraska "100 Miles From Nowhere" Posts: 2,219	Will a factory 4bbl manifold bolt on in place of a 2bbl? I have a factory stock 350ci w/factory 2bbl intake on a 72 C-10. I was given a 350ci 4bbl manifold and was wondering if they would swap out or if the heads and/or ports are different? I ran into this problem years ago with a Ford Cleveland 351 and the heads were different from 2bbl to 4bbl manifolds. Thanks! __________________ Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" "Be American, Buy American"

10-23-2010, 03:07 PM	#2
islandboy312 Registered User Join Date: Aug 2010 Location: hilo, hi Posts: 5	Re: Will a factory 4bbl manifold bolt on in place of a 2bbl? That's the cool thing about Chevys, great interchangability. As long as it's from the same generation of engine, (1955 to late 80's), it'll fit fine. Linkage and choke are the only issues you might have.

12-11-2010, 02:31 AM	#3
rayfinseats Registered User Join Date: Dec 2010 Location: sioux city, iowa Posts: 619	Re: Will a factory 4bbl manifold bolt on in place of a 2bbl? Pre 86 and after 86 are the main differences. If it looks like it will fit it will. Watch the bolts to the heads. You can see the difference. The newer engines have center bolt valve covers.

12-11-2010, 04:04 AM	#4
Jacfourteen Big Red - Now its a SWB! Join Date: Jun 2009 Location: Oroville, Ca Posts: 1,624	Re: Will a factory 4bbl manifold bolt on in place of a 2bbl? Yep, if its off the same era engine it will bolt up fine. __________________ 68 3/4 ton (Project)-350 Small Block, .030 over, 10:1 comp, 3998993 heads, C3BX edelbrock intake, comp cams XE268, Holley 670 SA, long tube headers, dual flow 40's, E-fan, Alum rad, currently under the knife getting shortened and bagged build thread 41 3/4 ton (wife's)-flatbed, fully restored to original 01 Tahoe LT 4WD (my daily driver)-Magnaflow Muffler, Rollin on 22's 02 Ford Mustang Convertable (Wife's Car)-Flowmaster 50, Clear corners, Intake, sittin on 18's

12-11-2010, 06:59 AM	#6
72freak Rottenwood Garage Member Join Date: May 2005 Location: Marietta, Georgia Posts: 4,321	Re: Will a factory 4bbl manifold bolt on in place of a 2bbl? Just make sure the manifold matches whatever carb CHOKE set up you want to use, that you have the correct carb adapter plate and once you swap it all make sure its not too tall. I have always been a fan of swapping to the front oil fill tube types like found on the 327 and some early 307's. __________________ 2004 Chevrolet Suburban C1500 2001 Chevrolet 2500HD Crew 6.0 1999 Harley Davidson Electra Glide 1972 Chevrolet C-20 Custom Camper "Dump Truck" 1972 Chevrolet C-20 Suburban "Big Green" 1969 Chevrolet C-50 Wedge Hauler "Leonidis" 1966 C-10 2x4 short fleet 327 4 speed "Race Truck" 1952 Plymouth Cranbrook "Rican" (my grandfathers) 1931 Ford Model A Coupe "Black Beauty" 1930 Ford Model A truck "Club Cab" 4x4 Rottenwood Garage and Speed Shop.....where everything must be racy! *It's not just a hobby..It's a LIFESTYLE!!!* Thanks for nothing Barrett-Jackson You cant fix stupid or teach accountability! Time wasters, looky Lous and tire kickers are everywhere!

12-11-2010, 08:04 AM	#7
rsavage Registered User Join Date: Aug 2009 Location: Alden NY Posts: 2,705	Re: Will a factory 4bbl manifold bolt on in place of a 2bbl? If it is a correct quadrajet manifold for our year trucks it will have a divorced choke set up on the passenger side and no egr valve provision on the driver's side. If it doesn't have a carb with it and you want to use what came on it, you will have to look for a quadrajet that has the divorced choke. You can find them on the parts board or on ebay and it should get a rebuild kit before you put it on. __________________ 1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7

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