Big Block Manifold
06-21-2006, 09:49 PM
#1
Melting Slicks
Thread Starter
Big Block Manifold
Has anyone installed an aluminum manifold on their big block? I am thinking about installing one on my stock big block. Any reccomendations on which one to use?
06-21-2006, 10:03 PM
#2
Team Owner
Member Since: Feb 2003
Location: Sitting in his Nowhere land Hanover Pa
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2015 C2 of Year Finalist
they came stock on most of them
06-21-2006, 10:20 PM
#3
Safety Car
Not on the 390 hp.
Your profile dosen't say but if you have a stock L36 then you have all the manifold you really need. Given some serious modifications (cam, exhaust headers etc.) an aftermarket intake would make some difference.
Your profile dosen't say but if you have a stock L36 then you have all the manifold you really need. Given some serious modifications (cam, exhaust headers etc.) an aftermarket intake would make some difference.
Last edited by 67L36Driver; 06-21-2006 at 10:26 PM.
06-21-2006, 10:39 PM
#4
Safety Car
Originally Posted by MidYearRoadster
Has anyone installed an aluminum manifold on their big block? I am thinking about installing one on my stock big block. Any reccomendations on which one to use?
in any case, i personally wouldn't go taller than a stock 425 manifold. they're 4.25" front, 5 7/8" rear (straight edge on carb mounting surface, hook tape measure on front and rear gasket surface and measure to straight edge.
06-21-2006, 11:01 PM
#5
Race Director
More likely than not it`s a oval port BB and not a L72. Otherwise the OEM 427/450 HP manifold would have been a stock application and he wouldn`t need one. Therefore it would have to be exclusively an aftermarket oval port style. There may be hood problems too. 
06-21-2006, 11:28 PM
#7
Race Director
Originally Posted by nassau66427
How about something like this?
06-21-2006, 11:35 PM
#9
Melting Slicks
I used a Weiand on my L36. A few years ago Weiand produced a manifold that was a clone to the 425 HP unit but with oval ports. I believe that the number through Weiand was an 8031 but I won't swear to it. The only thing I did was a little port matching to try to get a little better flow. Hope this helps. Good luck.
Steve
Had to add a PS on this. My number on this manifold was incorrect. It is an 8013. Sells for less than $200 according to last parts web site I looked at. Can't tell you if it gives you anything with respect to HP or Rev's as I haven't put my car on the track in years. Hope this helps.
Steve
Had to add a PS on this. My number on this manifold was incorrect. It is an 8013. Sells for less than $200 according to last parts web site I looked at. Can't tell you if it gives you anything with respect to HP or Rev's as I haven't put my car on the track in years. Hope this helps.
Last edited by 66BlkBB; 06-23-2006 at 09:43 AM.
06-21-2006, 11:54 PM
#10
Race Director
Originally Posted by nassau66427
MidYearRoadster's profile says '67. Weren't all '67s 435hp to begin with?
tri power.
06-21-2006, 11:57 PM
#11
Melting Slicks
Thread Starter
390
yes its a stock 390 hp..67. i was just toying with the idea of changing manifolds to save a bit of weight actually...and for looks..i do a lot of highway driving with it ..not into the racing anymore...was just curious if an aluminum would perform better ..perhaps a bit more efficent too. great response from you guys...thank you.
06-22-2006, 12:03 AM
#12
Safety Car
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Holley offers a Weiand part #300-42. 6.01" tall in rear, 4.51" tall in front. List no footnotes re: special instructions regarding installation in a '67 Corvette.
Ironcross-where is the tongue-in-cheek smiley when you need him?
Ironcross-where is the tongue-in-cheek smiley when you need him?
06-22-2006, 12:24 AM
#13
Safety Car
Originally Posted by MidYearRoadster
yes its a stock 390 hp..67. i was just toying with the idea of changing manifolds to save a bit of weight actually...and for looks..i do a lot of highway driving with it ..not into the racing anymore...was just curious if an aluminum would perform better ..perhaps a bit more efficent too. great response from you guys...thank you.
06-22-2006, 04:24 PM
#14
Safety Car
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C2 of Year Finalist (track prepared) 2019
2017 C2 of the Year Finalist
as sick as this sounds, you can run a L-72 intake on your heads.....
a square port intake wil seal to the oval port heads with a suare port gasket, just don't try it the other way around
a square port intake wil seal to the oval port heads with a suare port gasket, just don't try it the other way around
06-22-2006, 11:12 PM
#15
Safety Car
Originally Posted by nassau66427
MidYearRoadster's profile says '67. Weren't all '67s 435hp to begin with?
FWIW: 'Old Blue' has a iron 3883948 manifold from a '68 passenger car that takes a Qjet. Works good, looks stock (unless you remove the air cleaner) and IT ELIMINATES THE &%$@# HOLLEY.
