I found this website that tells you the dress, jewelry, shoes and hair styles for 1948: http://retro-fashion-history.com/html/1948_fashion.html I am going to a murder mystery dinner and I had to dress for this.
The Upturned Glass - 1947 was released on: UK: 17 June 1947 (London) USA: 4 November 1947 (New York City, New York) Portugal: 29 December 1947 Finland: 26 March 1948 Sweden: 12 April 1948 Germany: September 1948 Austria: 22 February 1949 Japan: 26 April 1949
You don't need to have a 1948 car. But they are tax exempt, you do not need to get them smogged. They are worth a bunch of money. They are very neat. A collectors item even if they are not in that good of shape.