Marcos Maniacs

G'day mates. Just a joke. I'm a new member from Australia and 
seriously considering purchasing a 1969 Marcos GT V6 with timber 
chassis (3/5416) in Melbourne, Australia - I live in Adelaide 800km 
away from Melbourne. I had my first contact with your group whilst 
surfing the net looking for info on this great marque - prior to 
buying! Jack Myer has already responded, which is fantastic, and he 
has offered to help with some timber chassis restoration photos etc. 
I posed a question to him about roll-over protection which I pose 
again here - how do you configure a roll cage and fix to timber 
chassis successfully??? I would like to participate in some historic 
track racing and tarmac rallying, and acknowledge that Australian 
standards will vary from other places in the world, but I would 
really appreciate a starting point.
Thanks in anticipation.