Great Western Road, just past Anniesland. The white building used to be a Homebase DIY warehouse. Have seen DSU 353G occasionally over the years - it's a Glasgow plate - and it's well known amongst Scottish Impers as a modified Super Imp eg http://www.imps4ever.info/cars/hillman/imp_sport/dsu_353g/dsu_353g.html . Glad that you had such an epic encounter to round off the day.