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older style intake

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Category: The Garage
Forum Name: AMC V8 Engine Repair and Modifications
Forum Description: AMC-made V8 engine mechanical, ignition and fuel from basic repair to high-perf modifications
Printed Date: Mar/31/2020 at 10:26am

Topic: older style intake
Posted By: CHAR
Subject: older style intake
Date Posted: Jun/12/2019 at 1:09pm
Hey all.

I have an older style Edelbrock 2131 low rise intake manifold on my '72 SST, and was wondering if it has a exhaust crossover under the carb like some older GM products.  The specs from Edelbrock are unclear.  Trying to decide if I need one of those thermal break carb gaskets or not.  It does look like the valley pan shield is in place and there is a 1" alum. spacer on top already.


Date Posted: Jun/12/2019 at 2:04pm
The #2131 is a Performer series Intake and it does have the heat crossover.

Home of:
Craig Breedlove' "AERO AMX" #1
1970 AMX 416,EFI,5 speed(Mine)   
1970 Javelin 401, 727 (My Wife's)
1969 AMX,390,Auto,Go Pac (My Mom's)

Posted By: billd
Date Posted: Jun/12/2019 at 3:15pm
Dennis - the walking, typing, dictionary of all things intake manifolds. Pretty cool.....
Anyway, speaking of cool - I personally prefer to run those insulators under carburetors after my experiences with gasoline lately - and hearing the stuff boil after shutting down. Even years ago it was something I liked to see as when a car is towed into the shop off I80 with fuel troubles and you are told "this family is in a hurry, get on it right away" and you burn your fingers getting a carburetor off - well.....  ;-)

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Posted By: CHAR
Date Posted: Jun/12/2019 at 4:08pm
Great, thanks guys.  Big gooey carb gasket it is.  maybe and airgap in the future.

Posted By: Midnight Rambler
Date Posted: Jun/12/2019 at 9:01pm
Originally posted by CHAR CHAR wrote:

Great, thanks guys.  Big gooey carb gasket it is.  maybe and airgap in the future.

Phenolic spacer, solid rubber, Jegs and Summit carry them from 1/2" to 2" for under $20.  Great insurance if you have the clearance, even if you don't need it for a heat problem it still keeps the carb cooler so it should increase performance.


'66 American 440 Convertible 290/WC M-37/AMC 20 3.15/PS/PB
'04 Jeep Wrangler X Rocky Mountain Edition 4.0 5sp

Posted By: CHAR
Date Posted: Jun/13/2019 at 11:32am
Yeah, I got the thinnest phenolic one for now.  The 2 1/2" open air filter dish hold down already leaves a good dimple in the hood pad.  May have to increase the filter diameter and cut the height.  thx

72 Javelin SST P code 360/auto/AC/rear defrost /Go Pack/Polar White w blue cord interior.

Posted By: sweatlock
Date Posted: Jun/13/2019 at 3:03pm
Depending on the type of carb, there are 1/4” thick phenolic spacers available as well if hood clearance, such as on an AMX, is a concern. 

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