:dontknow:I have an fifth generation el camino with a 1972 454 in it. The egr valve is bad and I can't find a new one. My question is if I remove the egr valve do I need to replace the carburetor too? Or, can I just block off the egr valve. How will that effect the way the engine performs? I'm thinking maybe I need to replace the manifold and carburetor.