Cornflower the advice he will get here is as its price says cheap, but maybe unreliable.
Pre and post 1983 are the result of changes dated then.
In my opinion as he is post 61 and not working he can take the preserved bit now.
While recent changes took place some affect younger people more than those close to retirement.
If I finished work now I could take the lot not much if any tax involved.
I would ask the super fund first.