your need a set of disc brake hubs,and cv's as drum brake cv shafts are smaller, best to look for a set of drive shafts in good usable condition for disc brakes
thats about it as long as what you buy second hand is in good usable condition ,
i was waiting for a set of these for to come along second hand for ages , got fed up and bought a new set from mini spares at christmas when they had 15% discount, they are very nice, mush lighter than standard callipers, not got round to fitted them as the car is still being rebuilt but i have test fit them on my hub with the wheels i have ( MS rose petals) and they fit fine ( bleed nipple is close but does not hit), and as long as you have no stick on weight on the inside on the wheel, no problems if there is knock on weights on the out side rim.
Edited by dean, 15 March 2014 - 06:31 PM.