I recently put the Pertronix Ignition on my 1969 250 and ever since the idle has been rough when in gear, to the point where it feels like it might die sitting at a light, it's worse when the car is warmed up. If I put it in neutral it smooths out somewhat. Any idea what might be causing this? I'm tempted to go back to points. It ran fine before I installed the Pertronix. Thanks for any help you can provide.