I grew up in the early 60's aircraft-spotting at Renfrew on Friday evenings as a 12 year-old. After reading this fascinating thread. I tried to plot the airport layout on Google, using the photos and an airport diagram from an early 60's British airports book. It worked out not too badly, but the ramp ended up having too much area, so I knew something was off quite a bit.
Then recently I got a copy of a Geographica map of Glasgow from about 1960 from my Father, and overlaid it on Google. To my utter surprise, after aligning points such as the Arkleston cemetery, intersection of Glasgow Road and Glebe Street, and Paisley Road, the runway does indeed seem to be just to the north of the M8.
Although not perfectly aligned and the streets are over-wide on the map, it all fits rather nicely.
My sincere thanks to you all for so much information - I look back on those years with much fondness, and it was the start of my life-long romance with aviation. Any other photos will be much appreciated.
Greetings from the west coast of Canada.
Adrian