ive done a few as you would know..have the complete chassis with everything in it done..brake lines fuel lines tank etc etc etc....then drop the body over..there is pelnty of room and you should not scratch any paint...do not bolt the body down before aligning the front panels...once all front panels are aligned and you have the body sitting square on thye chassis then bolt it all down...make sure you use a rattle gun coz they are supposed to be pulled down very tight on the chassis rubbers..