WTB 70 chevelle 2 barrel carb

70chevelleracing · 09-08-2010, 08:30 PM

looking to make my chevelle a stock elim car and looking to use a 2 barrel 350 due to the unpopular class it would put me into. just hope i can run the index. i think i need a roch 2gc - 7040113 or 7040114 i believe they say the sizes are 1686 or 1375 not sure the difference. any parts, thoughts or recomendations would be much appricated
Thank you
Dan Hyttsten
763-477-8806
hyttstenhomes@hotmail.com

Larry Fulton · 09-09-2010, 05:18 PM

According to the NHRA Engine Guides for '69 & '70 Chevrolet, these are the correct sizes and specs

'69 & '70 Chevrolet Passenger Car

- with 350" SBChevy / 2bbl. Rochester

- 2GV Model (divorced choke) with

1.686 is the Throttle Blade Bore ( 1 11/16" ( 1.6875" ) with

1.375 is the Venturi / Bowl Section Bore Size ( 1 3/8" )

(these "Big Venturi" 2bbls, are the one's that all of the dirt racers wanted for years.... sometimes incorrectly referred to as the 500 cfm 2bbl. )
(note the '71 Engine Guide shows the SBChevy 350" - 2bbl. carb had been downsized to the 1 1/4" Venturi)

** NHRA Engine Guides for '71, '72, '73 & '74 Chevrolet's - Document the SBChevy 400" - 2bbl. as having the following carb specs.

1.686 is the Throttle Blade Bore ( 1 1/16" ( 1.6875" ) with only a

1.250 is the Venturi / Bowl Section Bore Size ( 1 1/4" )

Hope this helps!

70chevelleracing · 09-09-2010, 06:05 PM

thanks larry

BOBOLA · 09-09-2010, 06:20 PM

I may have what you are looking for, i will have to find them in the shop and will get back with you. Ran this combo in a Nova 25 years ago and did very well with it. Will let you know what i find.

70chevelleracing · 09-09-2010, 08:43 PM

thank you i appricate it

Steve Williams · 09-10-2010, 06:54 AM

I have one with the intake still attached.

09-08-2010, 08:30 PM	#1
70chevelleracing Junior Member Join Date: Sep 2010 Posts: 5 Likes: 0 Liked 0 Times in 0 Posts	WTB 70 chevelle 2 barrel carb looking to make my chevelle a stock elim car and looking to use a 2 barrel 350 due to the unpopular class it would put me into. just hope i can run the index. i think i need a roch 2gc - 7040113 or 7040114 i believe they say the sizes are 1686 or 1375 not sure the difference. any parts, thoughts or recomendations would be much appricated Thank you Dan Hyttsten 763-477-8806 hyttstenhomes@hotmail.com

09-09-2010, 05:18 PM	#2
Larry Fulton Member Join Date: Oct 2003 Posts: 270 Likes: 49 Liked 0 Times in 0 Posts	Re: WTB 70 chevelle 2 barrel carb According to the NHRA Engine Guides for '69 & '70 Chevrolet, these are the correct sizes and specs '69 & '70 Chevrolet Passenger Car - with 350" SBChevy / 2bbl. Rochester - 2GV Model (divorced choke) with 1.686 is the Throttle Blade Bore ( 1 11/16" ( 1.6875" ) with 1.375 is the Venturi / Bowl Section Bore Size ( 1 3/8" ) (these "Big Venturi" 2bbls, are the one's that all of the dirt racers wanted for years.... sometimes incorrectly referred to as the 500 cfm 2bbl. ) (note the '71 Engine Guide shows the SBChevy 350" - 2bbl. carb had been downsized to the 1 1/4" Venturi) ** NHRA Engine Guides for '71, '72, '73 & '74 Chevrolet's - Document the SBChevy 400" - 2bbl. as having the following carb specs. 1.686 is the Throttle Blade Bore ( 1 1/16" ( 1.6875" ) with only a 1.250 is the Venturi / Bowl Section Bore Size ( 1 1/4" ) Hope this helps! __________________ Larry Fulton Last edited by Larry Fulton; 09-16-2010 at 08:58 PM. Reason: clarification of previous statement

09-09-2010, 06:05 PM	#3
70chevelleracing Junior Member Join Date: Sep 2010 Posts: 5 Likes: 0 Liked 0 Times in 0 Posts	Re: WTB 70 chevelle 2 barrel carb thanks larry

09-09-2010, 06:20 PM	#4
BOBOLA Junior Member Join Date: Mar 2009 Location: Houma, La. Posts: 12 Likes: 0 Liked 0 Times in 0 Posts	Re: WTB 70 chevelle 2 barrel carb I may have what you are looking for, i will have to find them in the shop and will get back with you. Ran this combo in a Nova 25 years ago and did very well with it. Will let you know what i find.

09-09-2010, 08:43 PM	#5
70chevelleracing Junior Member Join Date: Sep 2010 Posts: 5 Likes: 0 Liked 0 Times in 0 Posts	Re: WTB 70 chevelle 2 barrel carb thank you i appricate it

09-10-2010, 06:54 AM	#6
Steve Williams Member Join Date: Aug 2007 Location: Detroit, Michigan Posts: 352 Likes: 0 Liked 1 Time in 1 Post	Re: WTB 70 chevelle 2 barrel carb I have one with the intake still attached.