61 dual quad carb option 468A choke

[David S.]

Any one have any information on the choke to the 468A option dual carbs? Purchased car from the original owner. Previous owner had removed the intake and carbs and replaced with single carb for gas savings sometime in the early 70s. He saved all the factory equipment and gave them to me. I have the window sticker from when the car was new and verified on window sticker and this came with the 468A option, 270HP car. Anyway I ordered all the parts to rebuild the carbs, but do not see a choke on either one of the carbs, it looks like there is a fitting between the carbs with a rubber hose on the end, kind of like for a vacuum attachment, but car does not have vacuum distributor. Does this attach to the choke tube on the exhaust manifold. If so, does anyone know if these should have an external choke on one of the carbs? I looked through my restoration books and does not really go into detail for this 468A option dual carbs.

Thanks for any assistance

[Mike E.]

Re: 61 dual quad carb option 468A choke

Any one have any information on the choke to the 468A option dual carbs? Purchased car from the original owner. Previous owner had removed the intake and carbs and replaced with single carb for gas savings sometime in the early 70s. He saved all the factory equipment and gave them to me. I have the window sticker from when the car was new and verified on window sticker and this came with the 468A option, 270HP car. Anyway I ordered all the parts to rebuild the carbs, but do not see a choke on either one of the carbs, it looks like there is a fitting between the carbs with a rubber hose on the end, kind of like for a vacuum attachment, but car does not have vacuum distributor. Does this attach to the choke tube on the exhaust manifold. If so, does anyone know if these should have an external choke on one of the carbs? I looked through my restoration books and does not really go into detail for this 468A option dual carbs.

Thanks for any assistance

The rear carb should have a choke. The original distributor was a dual-point distributor, no vacuum advance, last three numbers of the part number stamped on the tag are 891. There are some extensive and informational articles done in the past on the 2x4 carb set-ups in the Corvette Restorer--the best way to access those is through buying the Restorer CD from the NCRS store. That will answer all the questions you've asked so far, and more. It will tell you what numbers should be cast on the base, on the main body, on the top, etc., and where to find those.
A 270 car is a desirable car--enjoy!!

[Tom P.]

Re: 61 dual quad carb option 468A choke

IF, IF, IF you have the original, correct 2x4 carbs, the REAR carb will have provision for a choke, whereas the FRONT will not. The front carb will not even have the locations for attachment or holes for the choke shaft drilled.
It would be great if you could provide pictures of the carbs.
The old WCFB carbs for the 2x4 setup are good carbs and work fine when properly rebuilt and adjusted. DO NOT sell the 2x4 setup short!

[Mark P.]

Re: 61 dual quad carb option 468A choke

David - the rear carb should have a choke flap and a thermo choke assembly.

Here are some photos of my 245HP 1960 carbs that have just been restored by Chuck Smith. Your carbs should look almost identical. The top, main body and base are the same casting #'s.

Some of the differences are the arms on the secondary air valve (see the 3/4" circular weight) are longer on a 270HP than the 245HP and on a 1961 the rear of the front carb base has been drilled for a vacuum port.

Chuck reproduces and or sells most of the parts for these carbs.

Mark

[Bruce B.]

Re: 61 dual quad carb option 468A choke

Mark,
What are the numbers on the outside lower area of the Bakelite choke housing?
Usually appear as 3 nunbers then 6 smaller letters and numbers in a rounded panel.
Thanks,
Bruce B

[Jack H.]

Re: 61 dual quad carb option 468A choke

The judging guide calls for the choke cover to be embossed 'Carter Climatic Control' and 'AB238S'. It does NOT define the casting number for the choke housing...

[David S.]

Re: 61 dual quad carb option 468A choke

Thanks for the replies, will post pictures of the carbs later tonight.

[David S.]

Re: 61 dual quad carb option 468A choke

David - the rear carb should have a choke flap and a thermo choke assembly.

Here are some photos of my 245HP 1960 carbs that have just been restored by Chuck Smith. Your carbs should look almost identical. The top, main body and base are the same casting #'s.

Some of the differences are the arms on the secondary air valve (see the 3/4" circular weight) are longer on a 270HP than the 245HP and on a 1961 the rear of the front carb base has been drilled for a vacuum port.

Chuck reproduces and or sells most of the parts for these carbs.

Mark

Nice job on the restoration of the manifold and carbs.

[Dennis C.]

Re: 61 dual quad carb option 468A choke

David,

Here are photo's of restored 270 HP carbs for a '61 - also from Chuck Smith. Let me know if there is something specific you want to see.

Regards,

Dennis

[Mark P.]

Re: 61 dual quad carb option 468A choke

Dennis - have you ran your carbs yet ? If so, did they run OK ?

I am thinking I will break in my newly rebuilt motor with my trusty Edelbrock carb and Holley manifold then after break in I'll install the dual carbs Chuck restored. It is a couple hours extra work but I know my Edelbrock will run perfectly and I am worried about messing with dual carbs with a new engine.

Chuck did a great job at taking a set of incomplete carbs and making a correct set for me. It did take 6 months though.


Thanks,

Mark

[Dennis C.]

Re: 61 dual quad carb option 468A choke

Dennis - have you ran your carbs yet ? If so, did they run OK ?

I am thinking I will break in my newly rebuilt motor with my trusty Edelbrock carb and Holley manifold then after break in I'll install the dual carbs Chuck restored. It is a couple hours extra work but I know my Edelbrock will run perfectly and I am worried about messing with dual carbs with a new engine.

Chuck did a great job at taking a set of incomplete carbs and making a correct set for me. It did take 6 months though.


Thanks,

Mark

Mark,

If your engine is a new rebuild, I would do the same thing. Too many variables otherwise.

In my case, I am only restoring the top half of my engine. It had an incorrect manifold, distributor, and carbs.

No, I haven't run them yet, but hope to finish up by the end of March.

Regards,

Dennis

[John H.]

Re: 61 dual quad carb option 468A choke

Here's the choke side of a '59 245hp setup - the 270 looked the same.

[Mark P.]

Re: 61 dual quad carb option 468A choke

John - can you please e-mail me a few pictures of the other side of that engine and front and rear as well. It would be extremely helpful getting my 1960 245HP engine together.

mpellowski@informatica.com

Thanks,

Mark

[David S.]

Re: 61 dual quad carb option 468A choke

Thanks Dennis, that is exactly what I was looking for. Looks like I am just missing the Choke from the rear carb. I will post pictures of the setup that I have. Who is Chuck Smith and is he reasonable on price to restore the carbs?

[Mark P.]

Re: 61 dual quad carb option 468A choke

Bruce - the numbers are 170 AB238S. Chuck supplied this cover since mine was missing.

Is this what your were expecting ?

Mark