Stock V6 Carburetor differences?

The only hot air choke I've ever seen was on a Commando. My 70 & 71 CJ's were both manual choke

 

I'm using a 2g off an early 60's Chevy V8 that I found in the junkyard. Works great after a quick rebuild.

 

To understand the carburetor differences it's best to observe the Dauntless engine from its inception.
When Buick installed the 225 V-6 in 1964 and 1965 that engine was equipped only with a single bore manifold.
These Buicks used either the Rochester BC 7024148 or BC 7024149 single throat carburetors.
In fact Rochester's were the only factory carburetors ever to be used for the 225 V-6.
According to old "Motors" publications, Buick still installed a few 225 V-6 engines into the 1967 model year.
The 1966,67 V-6 Buicks were all equipped with double throated Rochester carburetors.

Kaiser Jeep also installed a few Dauntless engines with a single throat Rochester # 7016507 (21-103).
I believe that these single throat Rochesters were installed only during the late 1965 model year.
Related topic, go see... http://www.earlycj5.com/forums/showthread.php?t=76636
Obviously the single throat carburetor was engineered to mount onto a single bore Dauntless manifold.
For those wanting to increase their Jeep Dauntless fuel mileage there remain a few single bore manifolds to be found.
Beginning in the 1966 model year the two barrel manifold was installed onto Jeep Dauntless engines.
Jeep then used the dual throat Rochester # 7026082 or # 7026086 (W/O emissions)
They also used # 7027082 or # 7041185 (with emmisions)
Carburetors used with or W/O emmissions will use a different float and lever.
They also use a different needle and seat.

Interestingly here are the compared torque and HP ratings.
Single throat = 225 ft lbs. torque @ 2400 rpm or 155 HP @ 4400 rpm
Dual.. throat = 235 ft lbs. torque @ 2400 rpm or 160 HP @ 4200 rpm

 

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