hi Andrew,
bit of a weird request but i think the yellow 4 door RS2000 is my old car (if its got the fuel cap cut out and rs2000 sticker in the fire wall in engine bay) and i have lost all pics of it, obviously before the digital photo age. mate if you could i would love a few pics of the old girl. 

johnalbclark at gmail.com
 
cheers mate 
john 

Depending on the other mods you may require an engineers report regardless so it may be an idea to discuss with an engineer. I've learnt that no matter what you here or have been told it all comes down to the interpretation of the person you enlist in regards to the legal requirements. Speak to a few engineers and get it from the horses mouth.

Just on what EPA tests cost.. its different in each state.
As far as I'm aware in NSW theres a couple places where you can get them or free (Penrith, Botany RTA's). Other state like SA I've read someone being asked for thousands of dollars. So best check with local engineers and traffic authorities to what the local law/cost is.