I just got more wiring instructions from that guy on how to wire the plug up.
You have two options on connecting the new conversion lead.
Option 1 - Connect the wires from the new lead straight across the ignition coil as follows.
Blue & Red - Positive Terminal ( leave attached any other wires that connect to this terminal )
Black & Grey - Negative Terminal ( leave attached any other wires that connect to this terminal )
Green & White - Earth ( there is a male lucar connector attached to the distributor body behind the module which provides an earth )
Option 2 - Cut the plug off the old lead and connect the wires in it to the ones in the new lead as follows,
Blue & Red (new lead) connect to White (old lead)
Black & Grey (new lead) connect to White & Black (old lead)
Green & White - Earth (connect as in option 1)

