The Hang 10 was such a cool model, vastly improved with the B engine in it. :D
The next improvement should be the removal of the Duster stripes. I'm no purist but seeing Plymouth stripes on Dodges, and Dodge stripes on Plymouths drives me crazy. Besides, the Hang 10 had some of the coolest graphics around, and they're available:
Phoenix Graphix 1974-75 Dodge Dart Hang 10 Decal Kit