i did mention the word "legal" didnt i? the engineers cert alone will cover the cost of a 308 in the same condition as that 253. VK's didnt come out with 253's so your fitting a non standard engine, and according to VSB14, itll need to be certified.
Being in QLD I'm not sure how you'll go with the RED 253, you might be in the same boat as VIC as Ari said, In NSW it's a little different.
In NSW, He can fit a "Blue" 253 with no problems, but I'm guessing everyone but me has missed the details on the inlet manifold. If you look closely, you'll note it's a HZ late "pollution" Red 253. The thermostat housing was the first telltale, then look at the EGR ports and they're slightly different to blue motor.
To get a red motor to comply with my local guy, he'll have to put in place all the pollution gear from a Blue or black motor and unfortunately if he get's a anal retentive inspector like my local one, he'll insist you put the blue/black timing chain set in place to retard the timing to match the blue/black motor pollution regs.