So there you have it, a frank and honest view on the controversial subject of Brabham Vivas. Of course there maybe slight inaccuracies, but in general this should represent the true picture that everyone can relate to.
So in my book any car converted to Brabham Specification after 1972 (or even Mid-70's) is a PLASTIC Brabham. But proving the car you are about to buy from that 'Dodgey Looking Bloke' is a genuine car is very difficult. Ask as many questions as possible and hopefully the above might help you out.
If anyone has any further information, then please don't hesitate to contact me. Or let me know your views on this touchy subject.
Guy