The sway bar on my Panel mounts to the frame totally different than the bars on my Suburbans. I'm not sure if they are interchangeable.
47.5 Panel
http://thumb12.webshots.net/t/76/76/3/39/47/2953339470078265772vsdytf_th.jpg
http://thumb12.webshots.net/t/80/80/1/49/77/2865149770078265772sbGYzy_th.jpg

This one came from a 52 Suburban that I put on my 50 Pickup.
http://thumb12.webshots.net/t/80/80/2/83/47/2287283470078265772jGcJsN_th.jpg
http://thumb12.webshots.net/t/82/82/1/53/27/2267153270078265772vZLbfp_th.jpg