They do work really really well for making torque and in a heavy vehicle, that’s the ticket. For a street bound vehicle, not overly concerned about ultimate HP and top end speed, the dual plane is the way to go. Lots of torque down low and in the mid range to make for a happy and fun street driving experience.
If your not in the street, or very limited on the street, I think you would have to be nutz to run a dual plane.