Original 2 BBL Carburetor Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**cericd** · 05-22-2025, 01:32 PM

Hey carb gurus, I'm trying to figure out exactly what carburetor would have originally been on my 1970 C/10 with a 307. When I looked it up in the 67-72 Parts Manual the best I could come up with is a Rochester R2-2GV, PN 7040105. I wanted to be certain before I try to locate one. Thanks.

**Rust_never_sleeps** · 05-22-2025, 02:16 PM

Excerpt from the manual, p652 for those keeping score at home:

**Rust_never_sleeps** · 05-22-2025, 02:21 PM

Bottom box is part number is for the NA9 RPO emissions option

54blackhornet · 05-22-2025, 06:42 PM

I have the 2GV on my 307. It’s a great carb when it is set up properly. I had mine rebuilt by a shop in Philly. I did have to install a fuel pressure regulator to keep it from flooding by the over pressure from late model fuel pumps. Mikes Carburetor Shop is a great source for 2GV parts.

**LockDoc** · 05-22-2025, 09:09 PM

Quote:

Originally Posted by cericd

Hey carb gurus, I'm trying to figure out exactly what carburetor would have originally been on my 1970 C/10 with a 307. When I looked it up in the 67-72 Parts Manual the best I could come up with is a Rochester R2-2GV, PN 7040105. I wanted to be certain before I try to locate one. Thanks.

My '69 with a 307/automatic has the number 7029105 and 31311 82.
.

connorm · 06-04-2025, 06:53 PM

Quote:

Originally Posted by 54blackhornet

I have the 2GV on my 307. It’s a great carb when it is set up properly. I had mine rebuilt by a shop in Philly. I did have to install a fuel pressure regulator to keep it from flooding by the over pressure from late model fuel pumps. Mikes Carburetor Shop is a great source for 2GV parts.

I also have a 1970 GMC C/2500 with a 307. Ontario built

What fuel pressure regulator do you have and fuel pump do you have? Electric?

05-22-2025, 01:32 PM	#1
cericd Senior Member Join Date: Jan 2012 Location: Texan, back in TX Posts: 2,209	Original 2 BBL Carburetor Question Hey carb gurus, I'm trying to figure out exactly what carburetor would have originally been on my 1970 C/10 with a 307. When I looked it up in the 67-72 Parts Manual the best I could come up with is a Rochester R2-2GV, PN 7040105. I wanted to be certain before I try to locate one. Thanks. __________________ Chris My 1970 SWB C/10 - https://67-72chevytrucks.com/vboard/...d.php?t=534872

05-22-2025, 02:16 PM	#2
Rust_never_sleeps Senior Member Join Date: Jun 2022 Location: San Ramon,CA Posts: 1,071	Re: Original 2 BBL Carburetor Question Excerpt from the manual, p652 for those keeping score at home: Attached Images __________________ 1970 C10 Custom longbed 350/350 “Carburetors are forgiving, timing is not” — Thunderhead289

05-22-2025, 02:21 PM	#3
Rust_never_sleeps Senior Member Join Date: Jun 2022 Location: San Ramon,CA Posts: 1,071	Re: Original 2 BBL Carburetor Question Bottom box is part number is for the NA9 RPO emissions option __________________ 1970 C10 Custom longbed 350/350 “Carburetors are forgiving, timing is not” — Thunderhead289

05-22-2025, 06:42 PM	#4
54blackhornet Registered User Join Date: Jul 2008 Location: Eastern Oregon Posts: 2,481	Re: Original 2 BBL Carburetor Question I have the 2GV on my 307. It’s a great carb when it is set up properly. I had mine rebuilt by a shop in Philly. I did have to install a fuel pressure regulator to keep it from flooding by the over pressure from late model fuel pumps. Mikes Carburetor Shop is a great source for 2GV parts. __________________ 71 C-20 07 Magnum RT AWD



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