Thanks for all the replies. It was a real doosie, found three connectors that were corroded, a bad connection on the main lead off the battery to the fuse box two earths had bad corrosion plus two wires running to the distributor had rubbed through and were shorting on each other.
To make matters worse my oil pressure sender is leaking oil into the starter motor (took it off cleaned all the oil off the armature) cleaned all the connectors, recharged the battery and put the dissy to about where it was from memory, bang up she fired played with the timing to the point where I could get a soilid idle. Drove out to my mechanics so he could check the timing ( I had it about half a degree retarded!! ) Running like a dream again, exhaust should arrive this week and then its off to the dyno to have the Motec computor fitted and see what she can put down....to fit the supercharger or not now?, depends how it goes with a decent tune in it I suppose.Thanks again all.