I don't know if your planning on racing it hard but if you are here are some things you might want to think about. I raced that car for quite awhile in the 80's in so cal. Make sure you use a ride height adjuster if your track is bumpy. we used the clear plastic ballcup that dubro made with a pen spring. The rod went into a hole drilled into the aluminum screw that goes thru the top motor plate. Associated also came out with a chassis stiffener that was made of kydex that u glued to the chassis front to back. U can make that yourself if u feel u need it. Last the motor plate hole needs to be reemed top a bigger diameter and the rear chassis slots need to be extended forward from where they are about a half inch. All this will increase rear bite and make your 12i so much easier to drive.
Of course with the new tires they make now you might be ok. But a ride adjuster is a must because that chassis always sagged without it. If your looking to be vintage the only body u can run is a TOJ that's all we ran in socal These are all suggestions good luck

Jake Gutierrez