WB will have the same RTS suspension geometry as all rails from about 6/77. As Oz says, only WB have the nose cut off. Mook, are you aware that a HQ-HZ bar won't bolt onto that chassis properly? put the bar on now and you'll see why, the front bolts don't go in. It will still stay there, but sometimes they don't sit right or wobble around a bit. See how it goes and if you aren't happy with it you canweld the HQ-HZ nose pieces back on.