Found the solution for a rear sway bar on my 49 3600 3/4 ton. I do have a Dana 60 rear end from a 1970 3/4 ton. Discovered that a rear sway bar on a 73-79 Ford 1 ton dually fits perfect under the 49 3600. The width is exact for the frame. Drilled the frame for 6" sway bar end links purchased at Carquest and made U-bolt mounts for the rearend which needed to clear the knee action shock links. Fits perfect. I'm sure it would even bolt right on to an original rear end. I'd love to post pictures but that's over my head. Dave V.