Hi Jerry. First I check the chassis mounting tab alignment front to rear with the wheels properly centered in the wells, and then check the body spacing side to side at the rockers (I've doofed it too many times!) Then I do the Texas Two Step. I drill a pilot hole. Then I follow with a 1/16. All with the pin vise of course.
Doesn't RRR make a first time every time self aligning gizmo for doing this?