My entire car is polybushed, I done the steering rack bush when I fitted my neuspeed front and rear antiroll bar kit which included rose jointed droplinks. I left the wishbones attached, just disconnected the droplinks and dropped the steering rack, subframe, dog bone mount and that's it. Honestly though, I wouldn't bother with it if that's the only reason for removing the subframe, the annoying part was trying to align the holes for the bolts for steering rack up to the subframe and the subframe to the body.
