Youve probably have seen this before - and I'm sure other car makers did the same kind of thing. Maybe GMH did a "'Strain" slang version on a Flexi-disc on the virtues of an FX Chev... sorry Holden, or maybe the Aussie cultural cringe was too great.....
Anyway have a laugh and remember what the world was like.
http://mk1-performance-conversions.co.uk/drive_in_comfort.htm