lost spark

roccodart, I may be doing the same soon. After "fixing" it, it runs fine, then just suddenly shuts off like I turned off the key. This happens while idling, it gave a slight shudder 2 or three times, not bad if I wasn't watching the motor I probably wouldn't have noticed it, then it just shuts off. It then won't start, after a few minutes letting it sit it starts. My pop even tried some starting fluid to see if it would start and nothing. the car idles fine, not rough, runs fine, then when it drops to idle it dies. tried bumping up the idle, no good. fuel is going into the carb. it really seems like something electrical is overheating then when it cools it fires again. Any ideas guys? I personally am not looking at vacuum because it idles fine...am I wrong? thanks again. work in progress and really leaning towards upgrading and replacing all the fuel and ignition components before they become issues in the future.