Ok, cheers Mike.
Got a new phase sensor, gapped to 0.2mm also, so that should in theory rule that out...
I'll check the earthing of the 2 ig amps in a moment when the car cools down. - its got the wiring loom from MSD (as was the entire kit), and didn't have to make any new eathing points.. - i'l diuble check thoigh to be sure.
Been out in her today, it it comes and goes - drove into town, and back and she was behaving fine. Drove in again 2 hours later, and it stuttered 3 or 4 times in the space of 5 miles....

Cheers