From what I've seen in pictures, the sway bar set-up on these tube axles is different than your "typical" sway bar set-up. I have a '38 Plymouth with the tube axle, there was no sway bar when I got it. In the few pictures I've seen, it looks like a "riser" of some sort attached to the spindle and the sway bar goes over the front frame rails. Also, in the pic from the OP, there is a different type shackle on the rear of the drivers side front leaf spring, which my car also does not have, mine has a plain "U" shaped shackle. My car does have some lean if I take corners at speed, but I don't know any different with this car. If anyone has more info on this type of sway bar set-up and shackle I mentioned, please chime in....pics appreciated. If anyone has installed another type of sway bar on the front, please post detailed pics of the attachments. Thanks.