Mopar performance single plane fitment on a magnum

The mopar intake is a spread bore design. there can be trouble with sealing the carb to the intake when using a square bore carb, Edelbrock has got this plate:

http://www.summitracing.com/int/parts/edl-2732/overview/

There is another Mag single plane from Indy, do a search "360 3m". But i think this is much more taller.

Michael

Hey guys
Another question about this manifold.
This is the only one I can find to fit a magnum.
http://www.summitracing.com/parts/dcc-5007380/overview/?ibanner=MobileSwitchNo
It says it needs an adapter plate to fit the 4150 carbs. I think most of the carbs now days are 4150 style square bores. Anyone know if there is a better single plain manifold to fit the magnum
Not sure why I need an adapter plate. I can grind the intake square or maybe because it's the bolt holes don't align.