I have a 302 PCM, RWC with a 2 bbl holley; basically 1980ís vintage (rebuilt engine with about 300 hours on it), but with a pertronix ignitor points conversion. Engineís been running like a top, but two days ago I went out for a 30 minute run. The engine started right up and ran fin for the first 5 minutes, but then began missing and sputtering. I would have thought that the engine was running out of fuel but these symptoms went on for 20 minutes as I idled back to the dock. The symptoms got worse as I went in, and she died just as I reached my dock, and would not restart. I did not have time for a full check; I did look down into the carb throat and saw fuel spurting out as I pumped the throttle. Keeping in mind the old rules of air, fuel, compression and spark, what is my most likely thing to look for when I have a chance to tear into it this weekend? I discount air and fuel, although I suppose the fuel could be contaminated (but a shot of starting fluid should reveal that). I also discount compression, as I donít know how compression would fine on startup and then deteriorate enough to prevent running 30 minutes later, but you tell me. That leaves me with spark. Could my coil or my pertronix have gone bad? Remember, the engine has been running fine, and even started up fine, but went downhill to eventually kaput as it warmed up. Any thoughts or suggestions would be appreciated.