Unfortunately I haven't experience to build custom car chassis and I don't know how to start. I'm looking instructions for full on-road car chassis with all basic mechanisms like suspension with shocks and differentials, steering and support for 1 or 2 drive motors. Of course It will be good if I can find some separate instructions for steering, chassis structure, suspension and power transmission and etc. I'm reading "The Unofficial LEGO Technic Builder's Guide". I'm learning basic concepts and would like to build simple chassis like that: http://www.brickshelf.com/gallery/vkyppwnsall/Technic/Datsun1600SSS/wip03.jpg. But there are no instructions for that.