406- Intake and 72 coupe
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Joined: Dec 2007
Posts: 99
Likes: 0
From: Charlotte NC
406 is the same outside dimension as a 350, that being said I have a 406 and run the Dart dual plane, 1/2 carb spacer, holley DP, with a drop low profile edelbrock 14" aircleaner, 3" filter, on my 75. The nut rubs the hood pretty hard. I think your hood is different than mine.
I actually have a brand new RPM airgap I was going to install, but the dart is so close to it I think I will port match the Dart and send the Air gap back to Summit.
Chevy HP magazine Sept. 08 issue, dyno tested 16 small block manifolds and the RPM air gap was great, better than a vitor junior on the top, right with a super victor, really suprised them. It gave port dimnsions though which do not quite add up to what I have on my garage floor. Also gives height dimenstions which may help you out.
You may be able to run the airgap with no spacer, can't do it on the dart, I think my accelorater pump arm hit.
Any way, hope this helps.
I actually have a brand new RPM airgap I was going to install, but the dart is so close to it I think I will port match the Dart and send the Air gap back to Summit.
Chevy HP magazine Sept. 08 issue, dyno tested 16 small block manifolds and the RPM air gap was great, better than a vitor junior on the top, right with a super victor, really suprised them. It gave port dimnsions though which do not quite add up to what I have on my garage floor. Also gives height dimenstions which may help you out.
You may be able to run the airgap with no spacer, can't do it on the dart, I think my accelorater pump arm hit.
Any way, hope this helps.
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
The stock 72 hood is a very low hood. The 73 and later hoods actually have more clearance than the early stock C3 hoods. I doubt even a Performer RPM is going to fit. You are very limited in your manifold choices. I ran the LT1 hood on mine and had a variety of intakes, the tallest was the Vic Jr. all of them even with a drop base were right up against the hood. Measure carefully.
Le Mans Master
Joined: May 2006
Posts: 9,993
Likes: 1,136
From: League City Tx
L88 hood is the only answer.....Anything you put on to fit under a stock 68-72 SB hood will choke anything bigger then a 350 to death......
MAYBE the old school Weiand Stealth intake will fit, its supposed to be good to 6800 rpms but I think thats on a 350 cid. You really need an RPM air gap or Vic Jr on a 406", especially if its gonna rev to 6k+.
Welcome to C3 hot rodding....
MAYBE the old school Weiand Stealth intake will fit, its supposed to be good to 6800 rpms but I think thats on a 350 cid. You really need an RPM air gap or Vic Jr on a 406", especially if its gonna rev to 6k+.
Welcome to C3 hot rodding....
Last edited by ajrothm; Feb 20, 2011 at 11:25 AM.
Drifting
Joined: Aug 2005
Posts: 1,682
Likes: 3
From: League City TX
I have a friend with a 383 in a 71 with a stock small block hood.
He is running a Chinese knock-off of the Performer RPM intake.
On his car he has to run a drop base air cleaner with a 2" air filter element to make it fit.
You might take a look at the Weiand Team G, part # 7530. Its about 1/2" shorter than a Performer RPM.
I cant offer any actual experience with that intake, but I would expect it to work pretty well.
He is running a Chinese knock-off of the Performer RPM intake.
On his car he has to run a drop base air cleaner with a 2" air filter element to make it fit.
You might take a look at the Weiand Team G, part # 7530. Its about 1/2" shorter than a Performer RPM.
I cant offer any actual experience with that intake, but I would expect it to work pretty well.
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Le Mans Master
Joined: Oct 2001
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From: Wildwood IL
Eddie
Le Mans Master
Joined: Oct 2001
Posts: 5,943
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From: Wildwood IL
Summit Racing Carries them, along with a host of others.
Look here..http://www.professional-products.com/
Eddie
Look here..http://www.professional-products.com/
Eddie