A further development was the Healey 1000/4 based on an updated Square Four, produced between 1971 and 1977.
ATP World Tour Masters 1000 | Denis Healey | Baja 1000 | Bathurst 1000 | Fortune 1000 | Austin-Healey | Adrian Healey | 1995 Tooheys 1000 | 1977 Hardie-Ferodo 1000 | Jeff Healey | House of 1000 Corpses | Chadwyck-Healey baronets | 1986 James Hardie 1000 | women's 1000 metres distance | Thomas J. Healey | temperature record of the past 1000 years | T-1000 | Sunbeam 1000 hp | men's K-2 1000 metres | Landkreuzer P. 1000 Ratte | HP Mini 1000 | Healey Willan | Donald Healey | Charles Chadwyck-Healey | Canoeing at the 2012 Summer Olympics – Men's K-2 1000 metres | Canoeing at the 1988 Summer Olympics – Men's K-2 1000 metres | Canoeing at the 1964 Summer Olympics – Men's K-4 1000 metres | Austin-Healey 100 | 2013 World Single Distance Speed Skating Championships – Women's 1000 metres | 1984 Sandown 1000 |