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I pressed mine out with a SuperCheap press, may be able to do it with a vice. Bits of rubber get left in the link so you need to clean them out with a wire brush. I used a vice to press the new bushes in, the metal sleeve was pressed in with the vice as well.
A torch would work just a messy way of doing it.

Heat them until they start to smoke a bit and then let them cool for a minute. They'll pop out easily then and not leave much, if any, residue to clean up.

New bushes press in OK with just a vice, then add the centre pins.