Holley rear vacuum port interfers with rear of carb throttle bracket

[bobh67 18]

Just purchased a new Holley 600. It has a large rear base mounted vacuum port. When I try to install my throttle bractet(the factory one that mounts to the 2 rear carb studs )it hits the vacuum port. Anyone have this problem? Do I have to modify the bracket? Is there another one available? Do I take out the rear vac. port? This can be done because there is another one in the 1" spacer directly below it? Any help?

Edited February 11, 2011 by bobh67

[MikeStang 247]

You can either remove and plug the port, or leave it in and stick a Rubber vac nipple over it, or put a piece of 3/8" hose with a bolt in it over the nipple....OR you can run to autozone or another parts place and buy that cheep little Spectra brand throttle bracket...it has a provision for a kick down cable as well if you are running one, and it only uses one stud on the carb to mount, i did this on a friends car and it works fine,,,,,you may have to bend the lower mounting bracket to make iut fit TIGHT because it has a tendancy to twist a bit because only one stud holds it on and there is a bit of clearance between the bracked and the edge of the carb base.

Mike

[bobh67 18]

You can either remove and plug the port, or leave it in and stick a Rubber vac nipple over it, or put a piece of 3/8" hose with a bolt in it over the nipple....OR you can run to autozone or another parts place and buy that cheep little Spectra brand throttle bracket...it has a provision for a kick down cable as well if you are running one, and it only uses one stud on the carb to mount, i did this on a friends car and it works fine,,,,,you may have to bend the lower mounting bracket to make iut fit TIGHT because it has a tendancy to twist a bit because only one stud holds it on and there is a bit of clearance between the bracked and the edge of the carb base.

Mike

 

Thanks Mike, I already bought the Spectre #2418 off E-Bay .It looks like it will do the job.I know what you meen about the clearance between the carb base and the bracket I can make that work. My BIGGEST concern was the dimension of the square linkage hole working on my stock 70 accelerator cable.Was that an issue?

[MikeStang 247]

No this was not an issue, it just snapped right in there on the 69, and im pretty sure the 69/70 cables are the same so far as the little square piece on the cable....But if its larger, i think the spectre part is actully split at the top, so you can open it up a bit or make it smaller....but im pretty sure its the same...hell i have the specter part on my 77trans am as well and it fits.

Mike

[Rcodenewf 44]

Maybe something like this would work. I had to change my original bracket to this style when i installed a holley:

http://www.mansfieldmustang.com/03-94.jpg

 

John

[bobh67 18]

Maybe something like this would work. I had to change my original bracket to this style when i installed a holley:

 

http://www.mansfieldmustang.com/03-94.jpg

 

John

 

That's exactly what I have and does NOT work The crossover part of this bracket that goes over to the rear RH carb stud hits the Holley rear large vacuum port.

[Rcodenewf 44]

Then how about this one with the raised portion to clear the pipe:

http://www.mansfieldmustang.com/03-04.JPG

[bobh67 18]

Then how about this one with the raised portion to clear the pipe:

http://www.mansfieldmustang.com/03-04.JPG

 

Now we're talking. That is the one.. I'll get a hold of them and price that option Thanks!

[LindenBruce 27]

Maybe something like this would work. I had to change my original bracket to this style when i installed a holley:

http://www.mansfieldmustang.com/03-94.jpg

 

John

 

Just FYI guys that throttle cable bracket is for 428's in Mustang and Cougars

(p/n C9ZZ-9741-BR)

 

 

 

Then how about this one with the raised portion to clear the pipe:

http://www.mansfieldmustang.com/03-04.JPG

 

Just FYI guys that throttle cable bracket is used with factory "Autolite" carburetor and aluminum carb spacer on 390 applications.

(p/n C9ZZ-9741-C)

 

The main thing is whatever works right? Bruce