Re: A couple points ...
Wanders off wondering why (British Govt subsidies perchance?)
$120m in 1978. Say £74m in 1978 prices, so about £330m at 2015 values. Which means the British taxpayer paid a subsidy in today's money of £36k per car completed.
Put another way, 2,500 people were employed for two years, so that's £132k per head in current values, and £66k per employee per year, for jobs that (again in current money) would be about £21k average salary.
Good to see that HM Government has always been consistent in the value for money it offers taxpayers.