Hi Cranston,
I am attaching a couple of outline maps of the shipyards and on one it shows Inchgreen Street. This street formed the Western boundary of Lithgows Kingston Yard. It also extended across Port Glasgow road and this was the part of the street that had tenement buildings where your great uncle would have stayed. Port Glasgow road was the main thoroughfare and at the port Glasgow boundary the name changed to Ardgown Street. I am not a member of Roots so they will not allow me to reply to a PM