Welcome! Awesome project car you got there. I am owner of #60
you might find some info about #64 in the phase 1 register thread
only 85 ever imported into Australia means they are quite rare. Main differences between this and later models is cable throttle body, manual air con and different interior, different front and rear bumpers.
there are some quirky differences but nothing major. Some parts are getting hard to find such as the throttle body because these do wear out
Does it have the standard airbox?