I believe that's the place someone I know of had a CA18 done, and it was never happy, never made power.
Considering what was put in (pistons, rods, headwork), and the supporting mods, it should have been a rocket but it just wasn't.
Even tuner reckoned there was something wrong with it.
A year later it developed massive issues and was garage'd and they said "its out of warranty, not our problem" and refused to touch it.
Owner initiated legal action but was advised it would be a long, hard battle and decided against it.
Car ended up being stripped i believe, at a massive loss to the owner.
Pretty sure he mentioned the place was called Crown and was down southern suburbs, so unless there is two with the same name, it's the same place.
Beware...