Yes you will need all the compliance papers, proof of purchase and anything else you can get your hands on to be safe. Regarding the mods it depends how picky the auvis guy is when giving you a blue slip, but mainly they are looking at engine numbers, chassis and compliance that everything matches up and all the compliance work has met adr standards.
for your last question that 14day transfer does not apply in your situation because you are putting fresh nsw rego on it.