Thank you Graham,
I do still have the copper core plug wires with champion N5C plugs with the screw ends. I also have changed out the dynamo to an alternator.
I have been told and read so many opinions on the plug wires. I may be wrong, but it does not seem there are many option for non copper wire with the screw ends. From what I understand the coil, distributor cap and plug wire would all need swapped to push type. I am wrong here?
I was also told by a person at a jag parts dealer a person could run the the copper wire with resistor plugs using electronic ignition? That on the surface does not seem correct?
Do you know what the symptomatic problems are when running copper wires in this setup?
I have read so many threads about the XK running poorly when heat saturated, mine often exhibits this problem. My temp usually points straight down and at idle may get to 90. The frustrating part is question yourself is it fuel or ignition. Each step I have taken is making the issue better.
It seems at this point the next step would be to swap the screw in plug wire set with push in and get another coil with the push-in as well unless there is a solution of non copper wire with screw ends.