hub conversions??

[lambinator]

can a drum hub be changed into disc??

[Baz]

you would need a whole new rear beam i think but yes

[johnnyg_vts]

baz is right, get a rear beam.
try ebay.

[willsy]

Yeah you'll need a full rear beam, try and make sure you get the brake lines with it aswel if possible as theyre different lengths to the drum disks, its not the end of the world if you cant though, brake lines are reasonably priced new from Citroen (For once) or can be extended if necessary