I just converted my sc8e to a rc8e. You will need the following to convert to a 1/10 SC. Using the rc8 chassis will give you the exact wheelbase as the Slash 4x4.
Chassis plate
Front and rear chassis braces
Center dog bones
Center diff raiser
To convert to rc8e, you will also need bumper, shock towers (I kept the sc8e ones), wing mount and wing.