I've had the car for 10 years and have only ran FRPP wires on them with no problems. Oh yeah, I started the cobra up for the first time in about 5 months. Started up perfect, but I noticed while it was idling for a couple mins the rpm's would jump up a couple hundred. When I leave if running for about 20 min. it does it a few times. When you rev it up it stumbles really bad, but after the rpm's magically bump up a little, it seems to rev up fine. Sounds like it might be intermitted spark, it still have the original dizzy so maybe the pip or something with the ol' dizzy.
This car is my pride and joy and have had it half of my adult life. I'm the only one who has ever touched or worked on it, I've got to get this figured out. Anyone have any ideas??