I think if the ute is out of rego it will need re engineering if its currently registered then your safe, it's like saying I have a engineered car but been off the Rd for 10 years, and won't need engineering, laws are always changing, I think there stopping the modified cars

Looking at that pic ^ I don't see a booster, but I do see rust in the engine bay, you won't even get a pink slip, is the pod filter even boxed off or come with a sheild?

You should have a blue compliance tag somewhere in your engine bay? Or check if the rta papers even match the engine numbers??