Here's how they did it. First they located the factory jig holes on the frame in the front and the back. A measurement using the jig holes as a reference point was taken from left to right in the back, and from left to right in front. Then the center of these jig hole measurements was established. Luck was on our side-when the laser sight was used, the centers lined up perfectly. We now knew the rest of the frame, minus the front, was accurate and in good shape as far as alignment goes. We then measured 115 inches from the center of the hub on the rear axle to the center of the front hub on both sides of the vehicle in order to determine the factory wheel position and centerline. That factory wheel position was where we planned to install the new straight axle. We all like altered-wheelbase cars, but not an accidental altered wheelbase through poor measuring.