Yeah it is a 70. Although it was a factory /6 that someone converted to the 340. Yes it is the ballast resistor up by the firewall (not actually attached - again one of the many little things!)
I have lots of fun little issues like this to sort out. I did change the plugs on the weekend as it felt like it was missing. Sure enough 7 of 8 were badly carbon covered. After changing the plugs though it still has a rough idle. Also I suspect the non fouled one may not have any fire at all as it looked really good and I seem to still have that miss. I will need to have a closer look at the wires to see if there is a partial open on that cylinder.
Man I need someone in my neck of the woods who wants to drink my beer and point out stuff like this....I have a lot to learn but am enjoying the journey! I can't afford to hire a mechanic but I would gladly trade beer for knowledge lol...
Dennis
