What you have is cross weight. You can probably get pretty close by simply lowering the right front spindle one washer. That will probably add 3 to 5 lbs to the right front and left rear. If that’s not enough then raise the left front spindle one washer. Your chassis probably has a little bit of twist in it which is somewhat normal for a used chassis. Many times the twist can be easily taken out but will usually return if you run predominantly at the same track.