Carb recommendation for 360 Magnum

First of all, if you have a 1406, you have a 600cfm carb, not 650.
The Ede 600 actually works very well. Are you leaving some power on the table ?
Probably on the top end. But how often are you going to be on the very top end of your car, other than the track ? Street light to street light, the Ede 600 has great signal, and works very good.
My carb choice for you would be the Ede 1806 Thunder Series 650 manual choke. I run this on my mild 360, and absolutely love it. I think for what you are doing with your car, you will be hard pressed to find a better all around carb.