Mods aren't too wild really, nothing that would cause trouble in an inspection I think.
- Changed to 17" wrx wheels, to clear the 4pot/2pot wrx brake upgrade
- Changed motor from EJ20G to EJ20R (they wouldn't even know that except different engine number)
- Changed from auto to 5spd manual
- Put VF34 turbo (doubt they'd even know that)
- Front mount intercooler (surely cars pass with these? it's mounted well)
- Coilovers (mate said his car passed with coilovers....although I'm leaning towards sticking the Billsteins back in just for this)
- Has the usual boxer rumble exhaust note but I changed it from a canon to an oval style muffler which is much quieter
- Strut braces front and back

Pit inspections in WA have always just been a massive grey area. Depends almost entirely on who you get, if they are a dick, what side of the bed they got out of that morning. Couple of years ago I passed an old L series over with my home done EJ20turbo conversion and it went straight over at Welshpool.
I hear Welshpool is closed now and I haven't taken a car for inspection in ages so just seeing what the best tips are these days.

Joondalup is too far away for me, what is the place in Osborne Park? Sounds like a winner...