318 Intake Manifold Question

Hello, I am working on a 74 dart with a 318, AFB Weber carb and I am having performance issues and some stalling.

I have done some reading and maybe I am using the intake for a TQ or Quadra-jet and does it cause a problem and how can I fix it? The secondaries look pretty large to me.

Here is a picture of my intake.

Author: 74dart