new power steering belts and questions

[Rusty Rae <rrae@cotl.com>]

okay I want to put a new power steering belt onto my 1987 4000csq i have
some problems though. To take off and put on the power steering belt you
have to take off the altenator belt and the Ac belt, well the altenator
is easy, but on the ac belt I cannot find the bolts for it. The one bolt
is in front and I can remove it, but the bolt on the back side is not so
easy, it is a hex screw? and it is between 5mm and 6mm?? So is this the
set screw? how, where do I find a 5.5mm hex wrench? 
thanks for the help,
Joe rae