Click the link in my sig, go to the Tech Index. If I don't have torque specs for your year (yet...) grab the page that's close to yours.
Oh - and since you painted the cover, don't screw up the paint! Use flat washers under the screw heads, or you'll flake the paint off and you'll have to start over.
Most differential covers tend to want 20-35 pound-feet of torque on the screws, but I find that German torque ("gutentiet") is usually sufficient. Use a paper gasket.