I went last year, lots of interesting stuff showed up. Bricklin, Isetta, A row of Volkswagens, a row of Model T Fords, etc. Registration is free and open to any pre-1992 car. How about an Austin Oppo meet up?
The show happens at 51st and N. Lamar. Coincidentally the June Bug rally starts in the same place on Saturday, for anybody with a VW.