- Jun 27, 2021
Looking for air intake flex duct part number 14005399 for 1978-79 g body 200, 267, 305U engine. Thank you.
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.If you don’t have to have GM original, look up Spectre 8741. That’s what I have on my 79 305-4brl
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
Yours is the same as mine, mounted on top of the rad support. See above.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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