They are easy-ish providing you have all the parts ready
http://www.ebay.co.uk/itm/AP-Style-R...3D150773662324
http://www.ebay.co.uk/itm/BRAKE-CLUT...item417844ccc3
or Girling which kits come with
http://www.ebay.co.uk/itm/Girling-Ma...item25640ee699
Slave cylinder
http://www.ebay.co.uk/itm/CLUTCH-SLA...item2ecf1ed877
Small female fitting for the clutch release arm for the slave rod to push in to
and the bell needs modding but you need to get it as close to the transmission housing as possible