Those are nothing special bolts. I use a 10mm 12 point half inch drive with an extension. easy peasy. put penetrating oil on them and they should come right out. The tip about unhooking the top of the shock and leaning it either way is also crucial to the job.

A little different but a good setup once you see how it has to work.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.