Jump to content

IGNORED

Carb Linkage arms. Are they Different?


z3beemer

Recommended Posts

I have a question and a problem. I'm doing a 73 restoration that was an auto.  I'm changing it over to manual with 72 round top carbs and intake manifold.  It appears the carb linkage arm that runs from the firewall bracket to the intake manifold are different lengths.  I looked on the micro fisch and it does not indicate that they are different. The mfg date on my 73 is 3/73 not sure the mfg date on the 72 (I only have the engine & trans).  Attached are two pics.  The yellow one is the original one on the 73 connected to the flat tops the silver one it the same linkage arm attached to the 72 round tops.  Note the spacing between the firewall bracket and the upright angle bracket on the linkage arm.  Comments, suggestions, resolutions greatly appreciaated.

Thanks

Paul (z3beemer)

DSC03136.JPG

DSC03670.JPG

Link to comment
Share on other sites


The linkage piece that mounts in the balance tube is very different between the round tops and the flat tops including the location of the slot where the shepherds hook connects. The round tops require a longer shepherds hook.

I'm not an expert at reading the parts fiche, but it seems to me they did use different parts. Goes like this:

12 ASSY-TORSION SHAFT A

18300-E4600  L241

18300-E4601  L24  7206

18300-N3300  L24  7207-7307

18300-N3600  L26  7308-7408

18300-N4310  L26  7409

I'm thinking you're looking for 18300-E4600 or E4601 which were used until 6/72. Your car came with 18300-N3300 which started in 7/72.

Link to comment
Share on other sites

Thanks for the input.  I guess I'll post in the want ads and see if anyone has a linkage arm from a 72.  If not I may be able to cut the one I have, and weld a section in to make it longer.  I can also weld a short stub on the shepherd hook. If I can't find one, I may need to call on the group to get a few dimensions.  In the meantime, if anyone has a linkage arm from a 72 (round top carb), let me know.

Thanks

Paul

Link to comment
Share on other sites

Well, I decided I'm going to try to weld an extension in the one I have.  Can anyone who has a 72 Z with round top carbs provide me a few dimensions?  I would need an overall dimension from the top of the shepherd hook to the end of the rod, and a dimension from the top of the shepherd hook to the end of the hook (the part that connects to the carb linkage).  Thanks in advance.

 

Paul

Link to comment
Share on other sites

You can get a rough idea of the difference between the two by looking at where on the intake manifolds the joint between the parts lands. Use the intake manifold and/or carb mounting bolts as reference markers. Using hoovered pics:

Here's the flat tops. Note that the linkage joint is about the center of the rear carb:
flattops.jpg

And here's the round tops. Note that the joint is further forward requiring the longer linkage piece:
roundtops.jpg

  • Agree 1
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Who's Online   0 Members, 0 Anonymous, 157 Guests (See full list)

    • There are no registered users currently online
×
×
  • Create New...

Important Information

By using this site, you agree to our Privacy Policy and Guidelines. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.