I've been trying to find some info on how Ford produced their wishbones. I've had very little luck other than to piece together that they forged center "Y's" (for lack of the proper term) and the ends that attach to the axles which then were welded into the tubes. What I'm trying to determine is how the tubes were formed. Are they 2 wedged U channels welded together? Or are they a single sheet stamped/formed into a tube and seam welded?