Is my Holley 1945 missing some parts?

[cruisebrothers]

Hi all,

Last week I managed to flood my Slant 6 (75 Duster 225 Automatic) pretty badly. Fuel was pouring out of the carburetor onto the intake and exhaust manifolds, and the engine was running awful with a lot of smoke.
The previous owner warned me this could happen if the car sits for a longer period of time. However, it had only been sitting on the driveway for about a week. He mentioned that he used to tap the carb with a hammer to get it going again.
I’m assuming the carburetor float\needle was sticking, so I removed the air cleaner and gently tapped the carb with a small plastic hammer. That actually worked, the leaking stopped and the engine runs fine again.

I did notice an uncovered hole on the carburetor. After doing some research online, it seems like this is bowl vent:

So the red circle shows the missing cover.
I saw some 1945 carbs on the internet having a vent tube coming out of the place where the green circle is. Mine does not have the vent tube.

This 1945 has the cover and the tube:

But this one on Ebay is missing the cover and tube as well:

Also the 75 workshop handbook shows a picture without cover. But not sure if it already was removed for maintenance:

Can anyone tell me if on some models the vent tube (like mine) was simply left off, without any cover?
I’m planning to order a rebuild kit for the carburetor, but I’m wondering if I should be looking for any additional parts as well.

Another question: I feel like the car is idling pretty high once it’s warmed up. Which screw should I adjust to bring it down a bit? Is that the “fast idle” screw or the “curb idle” screw?

By the way, I have to say the Slant 6 is a strong engine. Compared to a V8 I expected it to feel slow, but that’s definitely not the case.
In the future I might look into getting a bit more power out of it, but for now I just want to sort out the basics first.

Thanks for reading!
Bas

 

[Desoto291hemi]

No sir

That is for a different application
The hole for the tube isn’t machined and since there is no tube
The factory didn’t waste the money on putting a cover on there that was not needed

Tommy

 

[slantsixdan]

Yeah, some of the 1945s did and some didn't have an external bowl vent.

Carburetor operation and repair manuals and links to training movies and carb repair/modification threads are posted here for free download.

Follow tune-up parts and technique suggestions in this post, too.

If your car has an OSAC valve, bypass it – it's a dingus on the side of the air cleaner's main body, with one small hose to the carburetor and one small hose to the distributor. Run the hose directly from the carb to the distributor instead; that valve was a hang-on-and-pray item to squeak the cars past their new-vehicle emissions type-approval tests so they'd be legal for first sale, and they curbstomp driveability and fuel economy.

 

[Mattax]

Yeah, some of the 1945s did and some didn't have an external bowl vent.

Carburetor operation and repair manuals and links to training movies and carb repair/modification threads are posted here for free download.

Follow tune-up parts and technique suggestions in this post, too.

If your car has an OSAC valve, bypass it – it's a dingus on the side of the air cleaner's main body, with one small hose to the carburetor and one small hose to the distributor. Run the hose directly from the carb to the distributor instead; that valve was a hang-on-and-pray item to squeak the cars past their new-vehicle emissions type-approval tests so they'd be legal for first sale, and they curbstomp driveability and fuel economy.

I agree 100% its very worthwhile to learn the basics of how a carburetor works, and look over the factory info.
The on-line Imperial club charged their URL to a web.info
The index is now
Master Technician Service Conference - Chrysler's Training for Mechanics

I’m assuming the carburetor float\needle was sticking, so I removed the air cleaner and gently tapped the carb with a small plastic hammer.

So the issue here is not so much the carb leaking as over filling. An open bowl vent within the air cleaner is neccessary carburetor operation. Some carbs also have a vent that goes to the vapor control system when the engine is off.