If your doing it in-car.. a little play is all you need. .005
I could be wrong, but I dont think if you set it at .003 or .008 it will make any difference. You def dont want .000 or for it to be sloppy .010+
Dont glue the gasket down.. and triple check it. When you tighten down the front cover hard, it will reduce the number as the gasket compresses. Once everything is squared away, glue the gasket and install.
A lttle play is fine.. and all thats needed.