| [GMCnet] Aluminum intake manifold for our 403's [message #311715] |
Sat, 31 December 2016 00:41  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
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There is a stock Olds aluminum intake that will work for us. The casting number listed in a post before was wrong. The casting number for the large port 1982 to 1985 307 Olds is 22504068. Not ending in 4086. ( Thank you so much to Tom McManus for the correction, and help with my search.) One thing that has come to lite. This is a high demand part in the Olds committee. As it has larger ports then the manifold that came out the last half of the production year of 1985. Edelbrock make two intakes that will work with the heads that our 403's have as far as port alignment. But the carb mounting surface is 1/2 inch higher then our stock cast iron intake. Edelbrock # 3711 has an EGR port at $290. # 2711 doesn't at $320. So I just went out to check the clearance between my carb air cleaner, and the hatch. There is none. ( Body to frame pads are in place ). With the 403 being shorter then the 455. Why is my 403 carb air cleaner against the hatch? So were has the clearance gone that should be there? One thing that I could do. Is mount the manifold in the Bridgeport mill. And lower the carb mounting surface. Put in thicker body pads. Or find an original 307 intake manifold. I'm trying to make sure my EFI will fit after the intake is bolted down.
Bob Dunahugh 78 Royale
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