TX WTB - Single Barrel Rochester Carbs - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Sleipnir · 11-30-2017, 11:43 AM

I am looking to rebuild my 250 and put an Offy intake on it so I am looking for three single barrel carbs. I am ok with them needing to be rebuilt but need to be useable.

**Grumpy old man** · 11-30-2017, 02:28 PM

Just a heads up ,You can't just bolt 3 stock carbs onto the manifold and expect it to work , You have to remove the choke plate and idle circuit on the front and rear carbs and add a progressive linkage , Only the center carb feeds the engine until about 20% throttle then the outer carbs start to kick in .check out Speedway motors and a uni-syn

For years customers have been either putting up with poor idling multiple carburetor set-ups or spending hundreds of dollars converting the secondary carburetors so they did not have to idle circuits

https://www.ebay.com/itm/Uni-Syn-Car...-/151717668361

https://www.speedwaymotors.com/Garag...sh,250690.html

Sleipnir · 11-30-2017, 03:55 PM

Quote:

Originally Posted by Grumpy old man

Just a heads up ,You can't just bolt 3 stock carbs onto the manifold and expect it to work , You have to remove the choke plate and idle circuit on the front and rear carbs and add a progressive linkage , Only the center carb feeds the engine until about 20% throttle then the outer carbs start to kick in .check out Speedway motors and a uni-syn

For years customers have been either putting up with poor idling multiple carburetor set-ups or spending hundreds of dollars converting the secondary carburetors so they did not have to idle circuits

https://www.ebay.com/itm/Uni-Syn-Car...-/151717668361

https://www.speedwaymotors.com/Garag...sh,250690.html

Chrome is a little much for me but I did find the triple plain kit which is nice but expensive. Not to mention buying the adapters to bolt them to the Offy intake and then buying the linkage and the gauges to tune them. I mean its not a bad idea but it'll be over $1000 for that kind of setup.

**70STOVEBOLT** · 11-30-2017, 04:15 PM

I have one for $50 plus shipping/PayPal fees. See the thread below for pics

http://67-72chevytrucks.com/vboard/s...d.php?t=742834

Sleipnir · 11-30-2017, 04:18 PM

Quote:

Originally Posted by 70STOVEBOLT

I have one for $50 plus shipping/PayPal fees. See the thread below for pics

http://67-72chevytrucks.com/vboard/s...d.php?t=742834

Was the carb rebuilt?

**70STOVEBOLT** · 11-30-2017, 04:28 PM

It was a Holley reman about 8-9 years ago and it was on the running 250 in my truck until I pulled it and put in a 402 in 2015.

**70STOVEBOLT** · 12-01-2017, 10:32 AM

It has been stored in a climate controlled building since it was removed. It will run, but it may need rebuilt. It's a manual choke model.

TheSeeker · 12-01-2017, 11:06 AM

I have a few stock parts and carbs on the shelf in my garage, I took it all off for a Clifford and a 4 barrel on my 250. Curious what advantages are to the three carb setup, besides being awesome. I have trouble tuning one carb let alone 3

**1968k20** · 12-01-2017, 11:42 AM

I have one. Not sure of condition, but I will get some pics this weekend. $35 shipped

**67ChevNut** · 12-02-2017, 01:19 AM

I have 2 of those, $35 each, plus the ride

**oldwagon** · 12-03-2017, 07:38 AM

I have this one for $30 plus shipping. It is a Rochester off of a 250 from a 67 GMC.

11-30-2017, 11:43 AM	#1
Sleipnir Registered User Join Date: Oct 2017 Location: Seguin, TX Posts: 89	WTB - Single Barrel Rochester Carbs I am looking to rebuild my 250 and put an Offy intake on it so I am looking for three single barrel carbs. I am ok with them needing to be rebuilt but need to be useable.

11-30-2017, 02:28 PM	#2
Grumpy old man Senior Member Join Date: Dec 2013 Location: Gods country East,Tn Posts: 8,545	Re: WTB - Single Barrel Rochester Carbs Just a heads up ,You can't just bolt 3 stock carbs onto the manifold and expect it to work , You have to remove the choke plate and idle circuit on the front and rear carbs and add a progressive linkage , Only the center carb feeds the engine until about 20% throttle then the outer carbs start to kick in .check out Speedway motors and a uni-syn For years customers have been either putting up with poor idling multiple carburetor set-ups or spending hundreds of dollars converting the secondary carburetors so they did not have to idle circuits https://www.ebay.com/itm/Uni-Syn-Car...-/151717668361 https://www.speedwaymotors.com/Garag...sh,250690.html Last edited by Grumpy old man; 11-30-2017 at 02:35 PM.

11-30-2017, 04:15 PM	#4
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,254	Re: WTB - Single Barrel Rochester Carbs I have one for $50 plus shipping/PayPal fees. See the thread below for pics http://67-72chevytrucks.com/vboard/s...d.php?t=742834 __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

11-30-2017, 04:28 PM	#6
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,254	Re: WTB - Single Barrel Rochester Carbs It was a Holley reman about 8-9 years ago and it was on the running 250 in my truck until I pulled it and put in a 402 in 2015. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

12-01-2017, 10:32 AM	#7
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,254	Re: WTB - Single Barrel Rochester Carbs It has been stored in a climate controlled building since it was removed. It will run, but it may need rebuilt. It's a manual choke model. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

12-01-2017, 11:06 AM	#8
TheSeeker Registered User Join Date: Dec 2009 Location: Glendale, AZ Posts: 337	Re: WTB - Single Barrel Rochester Carbs I have a few stock parts and carbs on the shelf in my garage, I took it all off for a Clifford and a 4 barrel on my 250. Curious what advantages are to the three carb setup, besides being awesome. I have trouble tuning one carb let alone 3

12-01-2017, 11:42 AM	#9
1968k20 Senior Member Join Date: Dec 2009 Location: Chester,California Posts: 5,618	Re: WTB - Single Barrel Rochester Carbs I have one. Not sure of condition, but I will get some pics this weekend. $35 shipped __________________ 1977 Chevrolet K10 SWB Project 350/4spd/np205 1977 Chevrolet K20 LWB 350/350/203 1991 4Runner 22RE 5 SPD Yanmar Tractor 3 Cyl Diesel

12-02-2017, 01:19 AM	#10
67ChevNut Active Member Join Date: Mar 2009 Location: Eagle Pass, Posts: 195	Re: WTB - Single Barrel Rochester Carbs I have 2 of those, $35 each, plus the ride

12-03-2017, 07:38 AM	#11
oldwagon Registered User Join Date: Feb 2003 Location: Mulvane, Ks. Posts: 754	Re: WTB - Single Barrel Rochester Carbs I have this one for $30 plus shipping. It is a Rochester off of a 250 from a 67 GMC. Attached Images



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