Get radiator and AC condenser out of the way so you can hammer in an oversize XZN bit then use an impact gun. A lot of work but I don't see another way that's more palatable.

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked