Ok the 73's brakes are fukked,the master cylindar seems all rusted as is everything that hangs off it,I have a 76 that seems to be fine...has anyone swapped these over before or could suggest maybe something better?? Its only the missus 2t so she doesn't need and HSV master cylinder or anything..It does look pretty straight forward as in the linkages seem to meet at some similar points in the engine bay but any advice will be greatly appreciated..