Pejota-The rules don't mention or forbid a shock. The present suspension can be dampened by a shock with a simple setup. A cantilever could be used also to attach a shock. I found the shock more effective the closer and more direct it acts on the wheel though. Here is a pic of a simple conversion to shocks. This helps but not as much as the reduced friction and improved geometry of the double wishbone. Sketch that puppy up and we can take a look at your cantilevered suspension.
Pic the car is a
Powell wide pantoura chassis. Some CRC Pantoura and IRS parts, RC18T home added front and rear side shocks. Parts list available on the Pantoura thread.
john