Never heard of RCC specalitites but every other company, that I can think of, that has a mopar coilover front suspension has also replaced the K-frame that holds the engine.
For around the same price as the Art Morrision 4-link you could get into a
Lateral Dynamics or
XVMotorsports 3- Link suspensions which are inherently superior designs.
If your truly on a budget you may want to consider the
XV motorsports level 1 system. It's still torsion bars and leaf springs but it's been optimized.