I think the Truck Avenger will be too big. They have a 440, 670 and 770.
The problem will be the float and the overflow tube. The Avengers they connect the two vent tubes so as one drains the other fills. But these are 4 barrel carbs. Before The Avenger there was the Eagle Predator. They went belly up years ago. I believe Weber is the ony one who makes a kit. ALthough not consider street legal. Not much help though. I'm not really a carb guy.