Chevrolet Vega Alloy wheels (similar in appearance to the Avon wheels used on the droopsnoot Firenza) were used, as well as a newly developed glass-reinforced plastic air dam.
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The HA Van was eventually supplanted by the Chevanne, but because of fleet orders, particularly from British Telecom, British Rail and the Post Office, the HA van remained in production, ultimately using the later HC Viva's engine and gearbox, incredibly until 1983.