I am pretty sure he is right as the slope is just right for that areThe site was still built on in 1953 (on the OS 25 inch map).
On the hunch that that is the right site, what about the Valuation Rolls, which you can access for free in Stirling Council Archives?
Even easier, if anyone remembers this shop, do please get in touch either by email ([email protected]) or by posting a comment in the space below.