There are 2 1/5 scale clubs in Brisbane. 1 is at Wacol somewhere and 1 at Belmont (QORLS) 1485 Old Cleveland Road in the Rifle range precinct. They are not Oval tracks though. QORLS races every 3 weeks and has a meet this Sunday if the weather is kind.
http://www.danielspitstop.com.au is their official website.
hope this helps.
Tyson Webb