i have a problem with the main rear bushes (one that the main big bolt goes through to the chassis ,now the rear beam i just took of has fucked bushes and the new one has polybushes ,the problem is that the old ones have a metal pin going through them and the polybushes have another metal tube in ,they have been fitted before so it looks like the tube shoud stay but there is no way it will go over the thube that is on he chasis , has any one done these before ? thanks gary