Accually, I don't spend much time in there while it is running. I walk out. I don't know if that is the real problem or not, I can accually see the "smoke" coming the from the under the car through the whole system. So, it shouldn't even be CO, cuz CO is invisible. But seriously, I am very careful with that. I am a firefighter too so I know the hazards of CO piosoning. I think it is the heat on the carb mostely. After it stalled out, I just started thinking of things to blame it on...possible causes. I haqven't gotten back out there yet to work on it anymore, I have been working 12 hours shifts the last couple days. Thank you for your concern and I will as always be careful.
joel
1976 MGB with a 1977 engine