This collection of caches has nothing to do with the Church Micro series in the UK. Given that the Australian 2016 census indicates that No Religion and Jedi Knight are the fastest increasing classifications of the optional religion question "What is the person's religion?" it is not surprising that there is surfeit of empty churches that have been repurposed.
The former Black Forest Baptist Church in Glandore is now privately owned and operates as affordable housing. No other details are known about the former church.
Sadly this is not the nicest example of an old Adelaide church.
Using the digits of the year ABCD on the foundation stone that can be seen from the footpath you can determine the location of the geocache.
S34° 57.(B-C+A)(B-B)(C-D)' E138° 34.(B-C)(A-A)(C+A)'
Checksum 16.