Stall options...

That cam, in a 408", is basically a stocker. Peak torque, which will be basically flat just above idle, will be around 3K. I would go 3.54s in the Dana and get a tight convertor - something in the 2500 range. No need for more if this is a street car. Or change the camshaft to something respectible for a 4" engine and then match the convertor to it.