Anybody know about this intake? 318 single plane 2 barrel

Jumping in here rather late, but what the heck.
A bit of curiousity, on this single plane intake compared to the more common dual plane 2 bbl. My understanding is that single plane intakes are a better choice for higher end power and torque whereas the dual plane is better for lower end power. So was Chrysler's intention for these to be some sort of lame attempt at producing a higher HP 2 bbl 273/318?
Also with this 2 bbl single plane along with the torker I was also under the belief that a higher rise would help produce higher HP in the upper RPM'S. So what is with these pankake style single plane intakes?
A final thought. If you were building a mild 318 for say a dart with 3.23 gears and you had both intakes and a 500 CFM Holley 2 barrel what intake would you go with?