Contacts on the inside of the Distributer cap are corroded. I have sanded then back a little to remove this but there is still some surface pitting. Looks like the best option is to get a new one and new leads as well. I agree this might solve the misfire.
Do you think will solve the running rich? I have been researching injectors and cannot find out what mine are. No colour coding and the numbers on top do not come up with any search. What if the fuel pressure regulator was messed with previously? Should I unscrew the adjuster to lower some pressure in the injectors? Or would a pressure gauge show this up at the shrader valve?