I am replacing the rear lower link chassis bushes on my Defender 110. Got the link out fine. The issue is that I cannot shift the chassis bush (the one that is the large bush with triangular mount) which is the standard rubber single piece item. I have got the bolts securing to the chassis mount out ok. But the forward end of the bush is so 'bulged' that it will not withdraw. Before I start to burn off the rubber with a blow torch and gas myself any other suggestions?