Those are Torx bolts and require a Torx socket (available through all tool vendors and at most car parts stores). Although i don't exactly know what size they are, if you buy a small kit you should be able to find a 3/8" drive set that'll fit on any 3/8" ratchet. Once you get the right tools, they'll come out just like regular bolts and tighten the same way. Good luck!
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'84 Mustang 5.0 LX
My car