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1969 GTX stock Intake - Carburetor Stud Threads?

ToddMcF2002

ToddMcF2002

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Anyone know what the carb stud threads are? Need to order new studs...
 
With a stock Magnum air cleaner should I run any kind of spacer or just a gasket? Quick Fuel 750 here
 
ToddMcF2002 said:
Anyone know what the carb stud threads are? Need to order new studs...
Click to expand...

5/16-18 where it threads into the intake.
the portion that protrudes up is 5/16-24

overall length is about 1-3/8"

stud.png
 
Does anyone know if these cars had a carb spacer with a Super Commando air cleaner?

super_commando.jpg
 
I've got an air grabber air clearner on there now and I want to switch back to a Super Commando style (dantesparts DMPS-4551). About to install the stock intake, just wondering if this setup had a spacer stock
 
I do not think so. Have seen a lot of 440 cast manifolds and the studs are short as shown above.
 
What was the transition year for that? The 68 parts manual says stud for all carbs. I know hemi did not do that until 70.
 
I'll be hiding a Quick Fuel 750 under the air cleaner so I'm just going to do studs. But I do appreciate the history of these things!
 
With the factory intake you said you where installing

You going to run the heated crossover on the intake manifold or block it ?
 
Bee1971 said:
With the factory intake you said you where installing

You going to run the heated crossover on the intake manifold or block it ?
Click to expand...

I was intending to block it. My Felpro pan has it blocked by default. I'm open to thoughts there though?
 
I would definetly block it with your valley pan running that carb you mentioned

Honestly depending on hood clearance , I would run a thicker 3/16"-5/16" base gasket

But again , stud length , hood clearance , then a multitude of base gaskets - Unlimited choices
Open , four hole , divided

That factory intake - Divided or four hole
 
Bee1971 said:
I would definetly block it with your valley pan running that carb you mentioned

Honestly depending on hood clearance , I would run a thicker 3/16"-5/16" base gasket

But again , stud length , hood clearance , then a multitude of base gaskets - Unlimited choices
Open , four hole , divided

That factory intake - Divided or four hole
Click to expand...

Its four hole.
 
Well the Holley does not work with the stock manifold without a spacer confirmed that today. Both the choke and throttle side hit the manifold. Trying to see if I need 1/2" or a full 1" spacer.
 
ToddMcF2002 said:
Well the Holley does not work with the stock manifold without a spacer confirmed that today. Both the choke and throttle side hit the manifold. Trying to see if I need 1/2" or a full 1" spacer.
Click to expand...

I have a 1" 4 hole spacer.
Yours if you need it for the postage cost
 
gtx6970 said:
I have a 1" 4 hole spacer.
Yours if you need it for the postage cost
Click to expand...
Minimally I need a 3/4" just measured it. I'm not really happy here. I pulled an Edelbrock intake with the intent of running a stock intake height. The stock one is 1 1/8" shorter roughly. Now I'm adding back an inch. My goal is to run the Super Commando air cleaner and now I don't know if I'll have hood clearance with the stock hood.
 
Buy a drop base, unsilenced, from Mancini or others, and run the top half of your factory air cleaner.
Nobody will be the wiser. More hood clearance.
Also, you can cut down the divider until your holley works, without using a spacer. Been done for about 50 years, and if it's a big block, you don't have to worry about water or distributor when pulling the intake for modification.
If the holley interferes on the outside, I would cut on the manifold. It's not sacred. (I'm assuming a Carter was oem?)
 
Last edited:
33 IMP said:
Buy a drop base, unsilenced, from Mancini or others, and run the top half of your factory air cleaner.
Nobody will be the wiser. More hood clearance.
Also, you can cut down the divider until your holley works, without using a spacer. Been done for about 50 years, and if it's a big block, you don't have to worry about water or distributor when pulling the intake for modification.
If the holley interferes on the outside, I would cut on the manifold. It's not sacred. (I'm assuming a Carter was oem?)
Click to expand...

The biggest clearance problem I see is the choke fast idle screw when the throttle goes wide-open it’s in the furthest position downward of anything on the carburetor. It will only get worse if I try to open up the screw and slow down the RPMs on the fast idle. I’m starting to think I might be better off with an Edelbrock RPM dual plane, but the listed height is 2 inches higher than how I’m measuring the stock intake. I really have no context to how they’re doing the measurement. I guess the best thing to do is just try a spacer and a drop plate like you suggested. If anyone reading this has the configuration I’m describing with a super commando air filter let me know!
 
Performer rpm is the gold standard of dual planes, but a regular performer is quite a bit shorter. The performer isn't much better than a good factory iron intake..... but it's a bunch lighter, lol.
The street dominator has an excellent reputation, and is also quite short.
 
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