For a Solidworks model of the "Book Chassis," ie. Champion's, take a look at Jim McSorley's site http://mcsorley.net/locost/. He has an IGES drawing of the standard chassis as well as pdf's of several mode such as his 442 chassis.
The IGES file can easily be imported in Solidworks.
John
Mazda,
Great work. One question, though. You may have answered this already, if so point me to it and I'll look it up, but... Why did you decide to go with a double wishbone system instead of a rebuild of the Rotus rocker top arm?
John