Hi All
I have got the viva out and fully warmed up sure enough after 35mins running seamed to misfire and cut out but did start up straight away but running a bit uneven so i checked the voltage at the coil I got 13v-13.5v at the ballast and 11volts after the ballast and 10v coil to points this is with the engine at tick over. I think the next thing will be to book the car in for a rolling road test as I have no Idea I think I have done all I can.
Regards Chris.