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Jul 21st, 2025 | | | | Joined: Jan 2023 Posts: 110 'Bolter | | 'Bolter Joined: Jan 2023 Posts: 110 | Anyone familiar with a 250 Chevy motor? Did it come with a rochester carburetor 1 barrel, if so does anyone know the actual carburetor part number?
Thanks
Jim
1950 chevy shortbed 3100, 216 with a 3 on the tree.
| | | | | Joined: Mar 2014 Posts: 4,209 Moderator, Electrical Bay | | Moderator, Electrical Bay Joined: Mar 2014 Posts: 4,209 | It was indeed a Rochester 1bbl but fortunately it was NOT a Rochester B or BC model. As I recall it could have been manual choke or auto choke. I also think it was the Rochester R-1 and there would have been an additional number for man/auto choke. I've seen some of these with Carter carburetors on them and one I had for a brief while had a Carter but I can't remember...want to say 4339 was the number? It was man choke.
~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
| | | | | Joined: Sep 2011 Posts: 1,363 'Bolter | | 'Bolter Joined: Sep 2011 Posts: 1,363 | It would have come with a Rochester Mono-Jet.
As for # I don't have that info.
BC
1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc
1949 GMC 250 project in waiting
1960 C60 pasture art
Retired GM dealer tech. 1980 - 2022
| | | | | Joined: Jan 2019 Posts: 75 'Bolter | | 'Bolter Joined: Jan 2019 Posts: 75 | My 69 Nova L 6 , 250ci engine ; YES , it came with a "Rochester Mono-Jet carb" = 1 bbl . Look here (I just "searched Mono-jet carb" : https://www.ebay.com/itm/1759917897...p;campaignid=20856436953&mkgroupid=1I'm now using the Holley # 8007 , 4bbl , 390 cfm carb & OFFY intake . My car runs - - really good (using this set-up) ; still using my L 6 stock exhaust (here in Arizona) . . so,I still have stock "carb heat" . jim | | | | | Joined: Feb 2004 Posts: 28,674 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 28,674 | That Rochester Monojet was sort of like a Dyson vacuum cleaner- - - -it "inhales vigorously"! I'd suggest using a Carter YF calibrated for a 258 cubic inch AMC/Jeep engine. It should bolt onto the original intake manifold, but you might have to do a little tweaking to get the throttle linkage working properly.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
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