Choke Pull-Off Rod Identification

[Brian B.]

Hello. Could a member please advise if either of these two choke pull-off rods is the proper one for my application? If so,  which one is it?  Mine was missing when I bought my car and I've been chasing this answer down for years.

Carb #7044270  1974 SD-455 Automatic

Thank you, Brian

[Cliff Ruggles]

#2 is for a 1972-1977 Chevy divorced choke unit.

#1 is for 1970-74 Olds or some 73-74 Pontiac carbs.  Pontiac also used similar link with a different secondary shaft with a longer slot in it on some 73-74 units......Cliff

[Brian B.]

Thank You!!!

[Cliff Ruggles]

I'll add here that the second style used for the 73-74 Pontiac carbs will not work with the same secondary shaft that uses the type you have.  You can go the other way around if the link is missing to use the link you have, IF you remove the portion of the shaft linkage that supports the other type, it is not needed for the one you have in the pic......Cliff

[Brian B.]

Great.  I'll remove enough of it to avoid any interference.  I was using #1 and couldn't completely tune out a 4000 rpm stumble without removing the pull-off altogether.

[Brian B.]

Sorry meant I was using #2.

[Cliff Ruggles]

The pull-off would not be a player clear up at 4000rpm's if you were doing a full throttle run.  The release time and how it is adjusted effects the opening rate of the secondary airflaps and they would be fully open well before 4000rpm's if the pull-off release time were correct.......Cliff

[Brian B.]

Ah I see.  My canister might be part of the issue too. Car has never run stronger with pull-off removed.  It's not the correct final answer I know.....just removed it for troubleshooting. I'll modify the rod you mentioned and keep searching for the right canister.

[Cliff Ruggles]

We have the correct choke pull-offs for those carburetors so need to search for one.....Cliff