Replacing 94 Nissan Ignition Switch

I believe I have a faulty ignition switch on my 94 Nissan pickup (manual 5-speed). Often times takes several tries to get truck started. Turn key and nothing happend, continue attemps and eventually hear the starter turn. Had Starter tested clean a couple weeks back. I figure it must be the ignition switch. Does anyone know the procedure in replacing this switch? Thanks.

Bill