Well Bash, that is a very easy mod..you will need to gather some stock parts first.. the cheapest way to do that is buy the parts from eBay.. such as...

http://cgi.ebay.com/NEW-CEN-GST-GENE...QQcmdZViewItem

and

http://cgi.ebay.com/NEW-CEN-GST-GENE...QQcmdZViewItem

and finally

http://cgi.ebay.com/NEW-Revo-Y-Split...QQcmdZViewItem

when you buy the steering linkage be sure you get all of the parts: the link from the servo to the bellcrank, the servo saver bellcrank and the aluminum post the servo saver mounts to.. you also need a servo arm of the same length as your first servo. But most important the two servos need to be indentical to match movement speed and torque. then you will need to remove your radio tray, cut the battery box from the bottom, remove the servo mounts from the top that hold the reverse servo(you will no longer be able use reverse), the finally cut a slot to mirror the OEM servo mount but dont cut the slot too big as to cut the material for the servo mount screws.

Now mount the new servo and the new servo saver on the opposite post with the arm facing the OEM servo saver arm. Attach the y-splitter to both servos and to the receiver. now match the length of the 2 links from the servo to the servo saver arms, now mount the 2 servo arms but be sure you turn on the radio to center the two servos in sync and be sure the arms are in line with each other, and screw the arms to the servos.

Thats it basically, besides adjusting the links and the servo throw on the radio.

here is a pic that might help


good luck!!! And have fun....I hope this helps