Here you can see after the previous pictures showing the measurements.....the cross member had to be installed around 22 inches ahead of the postion of the rear axle....so it was very important to locate the center of the rear axle assembly on the top of the rear frame allowing one to figure the position where it was cut into the original Willys frame. This back half installation would also require the removal of the stock "X" member...in this photo, it was cut enough to install the crossmember, but was not completely removed till the new crossmember was fully welded in. Later, we would add additional 2x3inch channel from the crossmember forward into the frame rails to tie everything together.