This is a picture of my cab on setting on the firewall on the dolly I built out of 4X4's and 2X4's. I also put casters on it to be able to move it around. It worked very well to replace a portion of one cab corner. In fact it is setting on the dolly right now being prepared for paint.

http://community.webshots.com/photo/58753176/58834282bhGeoy

http://community.webshots.com/photo/58753176/58834855WZEsrQ