I don't see any reason this wouldn't work, provided the Edge boxes are for the same series trucks. Can't the Edge boxes be used without the Attitude and just have one power setting?
From the Edge site:
PN 33001 $269. 10 2003-2004 Dodge 5. 9L 305 Attitude
PN 33002 $269. 10 2004. 5-2005 Dodge 5. 9L 600 Series Attitude Monitor
PN 33003 $269. 10 2006-2007 Dodge 5. 9L 600/610 Series Attitude Monitor