Seatbelts are not needed but if fitted must be worn. Check out VSI21 on the VicRoads website.
They will have to be 'engineered' if you want them fitted but if not fitted it shouldn't stop you getting a roadworthy.
Your personal choice, many will tell you that they should be fitted...... Mine doesn't have them.
I'm sure a rear view mirror would have been fitted along with at least one wing mirror. Sensible idea anyway.
Indicators are a good idea in modern traffic. You can either cut holes in the bodywork which was done 'in period' or mount them on home made brackets so no damage is done to the bodywork. They don't have to be self-cancelling at that age.
In the UK years ago I used to drive an Austin Somerset that had trafficators rather than indicators, had someone nearly take me out when I was turning right and he decided to overtake ! Didn't see the orange arm sticking out, or if he did he probably didn't understand that it indicated I was turning.
Fitted indicators that mounted off the bumper mounts after that incident.
Colin

