The concreate Anchor you show is a good idea. Some of them are made of steel some are made of some sort of pot metal.

On a W 123; I already had a tap and a bolt in my colection of tools/junk. I tapped the inner bore of the bushing and screwed the bolt in and used a punch going through the opposite side and beat the businhing out.

One of our members used a torch and burned the rubber out to get the bushing out.

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84 300D, 82 Volvo 244Gl Diesel