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Old April 8th, 2011, 02:39 PM   #1 (permalink)
1968 Olds Cutlass S
 
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1968 Olds Cutlass S Intake Manifold

Can someone let me know what the correct casting number would be for both a 1968 Olds Cutlass S Rocket 350 with a 4 barrel carb; and the same info for a W31 intake manifold for a 1968 Ram Rod?
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Old April 11th, 2011, 03:52 PM   #2 (permalink)
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For the archives, I found out that for a 1968 350, no matter whether Std. 310 HP
or W-31, they used the same intake manifold, casting number 398663.
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Old June 26th, 2012, 05:07 AM   #3 (permalink)
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Quote:
Originally Posted by jdana24 View Post
For the archives, I found out that for a 1968 350, no matter whether Std. 310 HP
or W-31, they used the same intake manifold, casting number 398663.
Same casting is used on a 69 350 also but the 68 only has "divorced" choke. 69 has choke tubes to choke on carb!
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Old June 26th, 2012, 10:38 AM   #4 (permalink)
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Quote:
Originally Posted by Chesrown 67 OAI View Post
Same casting is used on a 69 350 also but the 68 only has "divorced" choke. 69 has choke tubes to choke on carb!
Uh, no. The 68-69 cars all used the same intake and divorced choke. The manifold doesn't have the provisions for the tubes for the integral choke. They have the cast-in pocket for the bimetallic coil. The 1970-up cars used the integral choke and the intakes had the provision for the tubes.
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Old June 26th, 2012, 01:16 PM   #5 (permalink)
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Quote:
Originally Posted by joe_padavano View Post
Uh, no. The 68-69 cars all used the same intake and divorced choke. The manifold doesn't have the provisions for the tubes for the integral choke. They have the cast-in pocket for the bimetallic coil. The 1970-up cars used the integral choke and the intakes had the provision for the tubes.
Say it aint so - Joe!!!
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Old June 26th, 2012, 02:49 PM   #6 (permalink)
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Tweed, I hate to tell you, but Joe is right (again) on this one. '70 started the tube style.
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Old June 26th, 2012, 06:53 PM   #7 (permalink)
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Tweed, I hate to tell you, but Joe is right (again) on this one. '70 started the tube style.
Ok. the ones i looked at in lansing musta been 70s??
now i know i have the right one for my 68 project. That was my main purpose?
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Old June 27th, 2012, 01:36 PM   #8 (permalink)
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Quote:
Originally Posted by jdana24 View Post
For the archives, I found out that for a 1968 350, no matter whether Std. 310 HP
or W-31, they used the same intake manifold, casting number 398663.
Jeff,

I checked my intake, it is the 398663 casting, 68 4bbl from cutlass S.
Archives are correct.

Joe
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Old June 27th, 2012, 01:36 PM
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