Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Thin Metal plate between intake manifold and carb?

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jbplanck:
Part order is this:  intake manifold, thin metal plate (no sealer from factory), thick gasket, then carb.

The thin metal piece goes on such that the formed parts go down into the intake, covering the EGR well to direct the air/fuel mixture into the intake with a minimum of turbulence.  The little holes in it meter the exhaust gas passed by the EGR valve (when activated). Mine is wasted from a square bore holly installed by previous owner.

Can I do without it? Is there an aftermarket replacement for this, part number? I am installing a rebuilt year/car correct q-jet.

jbplanck:
For reference this is a 1979 Trans Am Pontiac 400 block.

jbplanck:
Here is the square bore adapter. It used 4 hex bolts to attach to the intake manifold, and the holly mounted on the 4 studs seen below.  Last picture shows the EGR chamber cast in the primary holes.

Ethan1:
 You really don't need it, but if you're going correct, try the Perfomance Years forum. See if anyone has one. Heck, Cliff might have one.

Shark Racer:
I didn't realize they used those well into the 70's. I thought they disappeared in the early 70s.

I know Holley/Mr Gasket repro them for the early cars.

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