This is the carb and kick down linkage on a 67 350 with power glide. Do know if you could make out the number on the throttle shaft. It is 7033785, I found this on the internet.

USED-Quadrajet Primay Throttle Shaft - 7033785

Roger

 

Kickdown stud on the same site as Roger linked to.

Throttle Lever Stud / Trans Kickdown

Carburetor stud attaches to primary throttle shaft arm. Thread size: 1/4-20 Thread length: .375" Stud diameter: .187" Stud length: .160" Stud end diameter: .300" Overall length:...

quadrajetparts.com

 

Kickdown stud on the same site as Roger linked to.

Throttle Lever Stud / Trans Kickdown

Carburetor stud attaches to primary throttle shaft arm. Thread size: 1/4-20 Thread length: .375" Stud diameter: .187" Stud length: .160" Stud end diameter: .300" Overall length:...

quadrajetparts.com

Well, I received this stud and it is too large to fit in the slot on the kickdown rod. The diameter of this stud is 0.187 which is 3/16. The original rod - and the new, longer rod I obtained - only accept up to 5/32 or 0.156. I do notice in the old photos of the SBC kickdown that the stud is a ball stud, which is not actually the correct way to do it. I'd rather come up with a 5/32 stud so I won't have to resort to the ball stud.

 

Much thanks to both of you. This is exactly what I need!

 

Oops! Look again at my picture. My kickdown rod is too short to attach to the stud. I suspect my kickdown rod is from a 2 bbl and the rod for the 4 bbl is longer. Checking sources for confirmation.

 

That rod should be threaded and is adjustable. Enlarge Rogers 1st pic and you'll see.

 

Yeah I've been reading in the tranny forum and the 4 bbl rod is about an inch longer than the 2 bbl rod -- Mine won't adjust enough to connect. When the rebult PG was installed in the car the guy who did it left an un-connected 2 bbl kickdown rod hanging. I'll have to round up a 4 bbl rod and get it right. Or just manually downshift when I want to -- but I'd rather have it factory-correct.

 

I bought the longer rod from Ricks. I also just got the "post" (Summit) Alan noted for that lower hole and just used a small (about 1/2" long piece of metal flat stock with 1/16" hole at one end and hole pig enough to go over new post end I sandwiched on the carb side of that lower lever hole to secure the spring that is currently using it

I can snap a pic if you need it but basically a way to secure the return spring as the new post occupies that hole

 

My return spring is in the large hole that the new stud will occupy - but there is a much smaller hole just next to it that the return spring should actually be in at present. That small hole might not exist on all carb throttle controls, as I see there are a couple of variations. When I install the stud in the large hole I'll move the return spring to the small hole and should be OK. I'll need to experiment some with the kickdown adjustment. I don't want to be pulling on the kickdown rod every time I accelerate but will need to figure out how much that rod needs to move before it actually engages the kickdown.

I see the longer rod available at a couple of different sources, which is good. The Assy Manual actually shows the short rod as the correct part for all 327s, but we know that's incorrect. The manual shows the longer rod for larger engines but should also state that any 4 bbl carb will need the longer rod.

 

Looks like that rod is still available.

Roger

1967-1972 Camaro Kick down Linkage Upper Rod Assembly, Automatic Transmission, Powerglide, For Cars With 4-Barrel Carburetor

This kickdown upper rod assembly connects the carburetor lever to the bellhousing bellcrank lever. The upper rod works with the bellcrank lever and the lower rod to "kick" the powerglide into passing gear.

www.rickscamaros.com

 

Ball studs work as designed.
A 10-32 screw double-nutted works also.
Adjust carb for WOT first using assistance on pedal.
Then adjust kick down for max pull on stud.
This action will have trans upshift at 5500(?) RPM consistently within 0.05 seconds of multiple runs.

 

Just now realized the 10-32 screw is 3/16 and will be too large for the slots in the kickdown rod. A 9 might work, and a 8 would work for sure for the slot - but that gets pretty small for the hole in the carb throttle. Might have to go for a ball stud with 1/4 inch thread and workable stud diameter and ball diameter.

 

Thanks for the common sense suggestion. I might just do the screw and double nut. I'm not quite achieving WOT with the pedal to the floor, and I know there are a couple of possible causes for that. I'm not seeing anything loose in the pedal linkage around the firewall. I'll revisit that situation before I try to properly adjust the kickdown rod.