i have the HDK in my duster.

it has a few differences than the RMS.

-upper coilover mounts are different giving you 2 inches more travel.
-Denny offers different styles for different applications.
-the lower control arms are adjustable giving you adjustable track width.

he made mine with no motor mounts or sway bar stuff since im using a motor plate.

And Denny is fantastic to deal with and is a true mopar hot rodder