The threads are much bigger than the thermostat or fan bolts. To remove these lower shock bolts you need a half inch drive 10mm socket with a 6" extension, the top of the shock must be loose and free to swing forward and aft because with it straight up you cannot get on it.

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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.