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Have a rebuilt 1954 261, 30 over, with S-10 5 speed and 4.10 rear gears in my Chev. PU--use it as a daily driver. I have 2 options sitting in the shop at this time: A stock 1-bbl or a Carter Webber 2-bbl. Suggestions on best carburetor option for now?
Thanks--T.K.
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Joined: Sep 2004
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Run the Carter/Weber. I believe potential for better mileage.
Progessive carb,correct?
What do you guys think?
MBHD
12 port SDS EFI 
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Joined: Jan 2005
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Yes, progressive, and I agree - primary alone = better mileage and response.
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Thanks for the responses--Installed the Carter/Weber, and I am very pleased after first test drive. Will make some adjustments and get it out on the highway soon. Appreciate the advice...T.K.
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Dont go too lean in quest of gas mileage at the expense of exhaust valves. Nothing against the little progressive "pinto" carbs with the fancy name, but a single one on a grand champion dump truck motor is an odd concept. Not knowing the venturi sizes of the progressive 2 bbl.- I wonder if it has more or less venturi area than the 1-5/8 stocker. If not then a 235, or even a 216 stocker would be viable too ( but a bird in hand logic is hard to beat).
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Holley also made a progressive 2b they came in a 350&500 cfm I have one but i don't recall the cfm at this time. I can send you a photo if you'd like.
Larry/Twisted6 [oooooo]  Adding CFM adds boost  God doesn't like ugly.
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Holley also made a progressive 2b they came in a 350&500 cfm I have one but i don't recall the cfm at this time. I can send you a photo if you'd like. I'd like you to post a pic if possible. Thanks MBHD
12 port SDS EFI
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As you can see from the pictures, the throttle shafts are split, rotated 90° from the common 2 & 4 bbl., and are now parallel to each other.
There are 2 opinions as to whether the primary or secondary should face the engine, but they both can't, so any "normal" 2 bbl. adapter or manifold won't work.
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