id have a go urself mate.. if uve got some common sense its a easier job than ud think.. the previous zvh's ive rebuilt/built have worked out just as cheap if not cheaper than rebuilding a cvh bttm end...plus improving the torque no end... get all the basic rebuild parts, sort the oil ways in the zetec block (any local engineering company) water pump adaptor plate, £20, 1.3 cvh tensioner, use ur cvh bttom pulley etc etc n ul b away.....