I decided to test for spark at night in the dark just to be sure and have spark at both plugs but it appears weak. Spark is a nice white colour at least.

The front plug, the lower one, seems to have regular spark on crank but the upper one is intermittent but at least it's there and gives me hope. I'll re-check all connections including the earth points.

Can anyone please tell me if the two pulse generators are identical and if the air gap on the uppermost one is supposed to be .025" whereas the lower one is .010" It would be nice to be able to either chase up another set or finally be able to delete this area as a problem.

Is the front plug No. 1?