Quadrajets!!

The Quadrajet is a decent carburator if its in good condition.   Most of them are worn out .....and when they are....  Rottenchester!    I had one on a chevy pick up for years... and it was wornout.

Quadrajet are indeed an interesting carburetor and as to application? GM used them on the Sprint overhead cam inline 6 engine which came in at a maximum of 250 cu in's. The Carburetor I believe was rated at 760CFM.

purple72Gremlin wrote: The Quadrajet is a decent carburator if its in good condition.   Most of them are worn out .....and when they are....  Rottenchester!    I had one on a chevy pick up for years... and it was wornout.

biggest problem with them is the last guy that had it off the engine, the top plate/air horn gets warped by some idiot that thinks they need the 5/16 bolts that hold it to the manifold tighter than f@%*....

2nd biggest is the air valve adjustment....

I have worked on and raced jets for almost 50 years. I have installed them and tuned them on just about anything you can imagine. They have the ability to be adapted to and perform well on almost any engine bigger than about 150 cubic inches. However, you have to understand their operation and be able to know what modifications are pertinent and effective to dial them in to a non-stock application. Considering that GM engineering them to work on 305 Chevies, 307 Oldsmobiles, 301 Pontiacs, making one work on a 304 AMC is not difficult. In fact, selecting one that was engineered for a 79-84 305 Chevy truck would be a decent place to start. It will help to have access to metering rods, jets, power piston springs and secondary metering rod hangers to be able to tune it effectively. Make changes methodically and recorded well to be able to zero in on the performance you want.

That being said, I adamantly recommend that you do not install it on a stock AMC manifold with an adapter. Use an Edelbrock Performer with an open adapter and blend the steps and sharp edges out of the area where the adapter transitions to the plenum in the manifold. If you can find an old Trans-Dapt adapter that has a divider plate, or modify an existing adapter to have a divider plate to separate the two sides of the manifold, low to mid speed throttle response, smoothness of operation and economy will be improved.

There is an abundance of technical material and information available that can educate you and guide you. I recommend either Doug Roe's classic book on Rochester carburetors (Roe was a Rochester engineer) or Cliff Ruggles' book that is published by HP.

Good luck!

They are very efficient when working right.