Wanted 1978-79 Air intake duct

CaballeroCanuck

Not-quite-so-new-guy
Jun 27, 2021
18
13
Looking for air intake flex duct part number 14005399 for 1978-79 g body 200, 267, 305U engine. Thank you.
 

carnutjw

Master Mechanic
Supporting Member
Sep 17, 2017
410
93
If you don’t have to have GM original, look up Spectre 8741. That’s what I have on my 79 305-4brl
 
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CaballeroCanuck

Not-quite-so-new-guy
Thread starter
Jun 27, 2021
18
13
If you don’t have to have GM original, look up Spectre 8741. That’s what I have on my 79 305-4brl
Do you have a photo of your installation ? The air cleaner inlet is about 3 1/2 inches OD and the Spectre part is only 3 inches. Did you still use the part of the original duct that screws on to the rad support ? Thanks in advance for your help.
Jim
 

carnutjw

Master Mechanic
Supporting Member
Sep 17, 2017
410
93
Not sure if yours is exactly the same. Seems like Malibus or 2brl carbs have different ducting? Some have the air duct on top of the rad. support.
IMG_0849.jpg
 
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gnvair

G-Body Guru
Sep 1, 2018
872
93
Southern New Jersey near Philly
I have found that the 5.0 liter 2 barrel and 5.7 liter 4 barrel cars on the 78's used a molded plastic duct that had an integral scoop. It mounted to the top of the radiator support. It had a large opening in the air cleaner snorkle. The 79 5.0 liter 4 barrels had a smaller snorkle and used a tube that hooked to a molded plastic scoop that mounted between the right side head light opening and the radiator opening on the radiator support. From what I have seen, the V6 and 4.4 liter V8 cars used the smaller diameter tube but still mounted to the top of the support. I am not sure why all the variations.
My favorite was the factory78-79 5.7 liter air cleaner with the 78 2 barrel tube.
 

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CaballeroCanuck

Not-quite-so-new-guy
Thread starter
Jun 27, 2021
18
13
Not sure if yours is exactly the same. Seems like Malibus or 2brl carbs have different ducting? Some have the air duct on top of the rad. support.
View attachment 178856
Mine mounts to the top of the rad cradle as shown here and in the post from gnvair. I'll have to check if Spectre makes a 3 1/2 dia. duct. Thanks for your quick reply. Jim
 

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    Caballero air duct 1 2021-06-29.JPG
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CaballeroCanuck

Not-quite-so-new-guy
Thread starter
Jun 27, 2021
18
13
I have found that the 5.0 liter 2 barrel and 5.7 liter 4 barrel cars on the 78's used a molded plastic duct that had an integral scoop. It mounted to the top of the radiator support. It had a large opening in the air cleaner snorkle. The 79 5.0 liter 4 barrels had a smaller snorkle and used a tube that hooked to a molded plastic scoop that mounted between the right side head light opening and the radiator opening on the radiator support. From what I have seen, the V6 and 4.4 liter V8 cars used the smaller diameter tube but still mounted to the top of the support. I am not sure why all the variations.
My favorite was the factory78-79 5.7 liter air cleaner with the 78 2 barrel tube.
Yours is the same as mine, mounted on top of the rad support. See above.
 
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